/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:25:26,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:25:26,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:25:26,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:25:26,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:25:26,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:25:26,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:25:26,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:25:26,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:25:26,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:25:26,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:25:26,346 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:25:26,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:25:26,347 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:25:26,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:25:26,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:25:26,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:25:26,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:25:26,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:25:26,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:25:26,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:25:26,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:25:26,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:25:26,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:25:26,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:25:26,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:25:26,610 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:25:26,611 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:25:26,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl [2021-07-09 17:25:26,612 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-07-09 17:25:26,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:25:26,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:25:26,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:25:26,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:25:26,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:25:26,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:25:26,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:25:26,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:25:26,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:25:26,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... [2021-07-09 17:25:26,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:25:26,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:25:26,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:25:26,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:25:26,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:25:26,780 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:25:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:25:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:25:26,780 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:25:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:25:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:25:26,780 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:25:26,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:25:26,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:25:26,781 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:25:26,781 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:25:26,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:25:26,781 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:25:27,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:25:27,047 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-09 17:25:27,047 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:25:27,048 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 17:25:27,048 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-09 17:25:27,049 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:25:27 BoogieIcfgContainer [2021-07-09 17:25:27,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:25:27,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:25:27,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:25:27,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:25:27,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:26" (1/2) ... [2021-07-09 17:25:27,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fff3ee and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:25:27, skipping insertion in model container [2021-07-09 17:25:27,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:25:27" (2/2) ... [2021-07-09 17:25:27,054 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-07-09 17:25:27,057 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:25:27,058 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:25:27,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:25:27,058 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:25:27,109 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:25:27,123 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:25:27,144 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:25:27,144 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:25:27,145 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:25:27,145 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:25:27,145 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:25:27,145 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:25:27,145 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:25:27,145 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:25:27,151 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-07-09 17:25:27,168 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:27,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,177 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,177 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068600, now seen corresponding path program 1 times [2021-07-09 17:25:27,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068598302] [2021-07-09 17:25:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068598302] [2021-07-09 17:25:27,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068598302] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:27,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:27,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:27,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637134487] [2021-07-09 17:25:27,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:27,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:27,378 INFO L87 Difference]: Start difference. First operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:27,459 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-07-09 17:25:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:27,467 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:25:27,467 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:25:27,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:25:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-07-09 17:25:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-07-09 17:25:27,494 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-07-09 17:25:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:27,495 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-07-09 17:25:27,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-07-09 17:25:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:27,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,496 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:25:27,496 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1063669592, now seen corresponding path program 2 times [2021-07-09 17:25:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621930780] [2021-07-09 17:25:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621930780] [2021-07-09 17:25:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621930780] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:27,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451765385] [2021-07-09 17:25:27,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:27,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:27,531 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:27,624 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-07-09 17:25:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:27,626 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:25:27,626 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:25:27,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:25:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-07-09 17:25:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-07-09 17:25:27,635 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-07-09 17:25:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:27,635 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-07-09 17:25:27,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-07-09 17:25:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:27,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,636 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:25:27,636 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash 284971666, now seen corresponding path program 3 times [2021-07-09 17:25:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475400661] [2021-07-09 17:25:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475400661] [2021-07-09 17:25:27,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475400661] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:27,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:27,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:27,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885232224] [2021-07-09 17:25:27,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:27,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:27,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:27,667 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:27,738 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-07-09 17:25:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:27,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:27,740 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:25:27,740 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:25:27,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:25:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-07-09 17:25:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-07-09 17:25:27,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-07-09 17:25:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:27,749 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-07-09 17:25:27,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-07-09 17:25:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:27,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,750 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:25:27,750 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,750 INFO L82 PathProgramCache]: Analyzing trace with hash -791726200, now seen corresponding path program 4 times [2021-07-09 17:25:27,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156718650] [2021-07-09 17:25:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156718650] [2021-07-09 17:25:27,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156718650] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:27,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:27,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:27,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732471898] [2021-07-09 17:25:27,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:27,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:27,808 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:27,881 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-07-09 17:25:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:27,885 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:25:27,885 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:25:27,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:25:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-07-09 17:25:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-07-09 17:25:27,908 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-07-09 17:25:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:27,909 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-07-09 17:25:27,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-07-09 17:25:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:27,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,911 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:25:27,912 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359368, now seen corresponding path program 5 times [2021-07-09 17:25:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950460148] [2021-07-09 17:25:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950460148] [2021-07-09 17:25:27,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950460148] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:27,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:27,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:27,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739296361] [2021-07-09 17:25:27,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:27,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:27,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:27,962 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:28,032 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-07-09 17:25:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:28,033 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:25:28,033 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:25:28,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:28,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:25:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-07-09 17:25:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-07-09 17:25:28,045 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-07-09 17:25:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:28,045 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-07-09 17:25:28,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-07-09 17:25:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:28,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:28,046 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:28,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:25:28,047 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1756874686, now seen corresponding path program 6 times [2021-07-09 17:25:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:28,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573684361] [2021-07-09 17:25:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:28,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573684361] [2021-07-09 17:25:28,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573684361] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:28,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:28,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:28,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43727265] [2021-07-09 17:25:28,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:28,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:28,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:28,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:28,081 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:28,150 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-07-09 17:25:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:28,152 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:25:28,152 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:25:28,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:25:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-07-09 17:25:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-07-09 17:25:28,156 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-07-09 17:25:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:28,156 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-07-09 17:25:28,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-07-09 17:25:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:28,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:28,157 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:28,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:25:28,157 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1483038554, now seen corresponding path program 1 times [2021-07-09 17:25:28,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:28,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238739745] [2021-07-09 17:25:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:28,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238739745] [2021-07-09 17:25:28,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238739745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30250221] [2021-07-09 17:25:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30250221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:28,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:25:28,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187785584] [2021-07-09 17:25:28,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:28,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:28,462 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:28,580 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-07-09 17:25:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:28,582 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:25:28,582 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:25:28,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:25:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-07-09 17:25:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.8214285714285716) internal successors, (316), 112 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-07-09 17:25:28,591 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-07-09 17:25:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:28,591 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-07-09 17:25:28,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-07-09 17:25:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:28,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:28,592 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:28,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 17:25:28,809 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash -180956976, now seen corresponding path program 1 times [2021-07-09 17:25:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:28,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453059907] [2021-07-09 17:25:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:28,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453059907] [2021-07-09 17:25:28,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453059907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893691774] [2021-07-09 17:25:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:29,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893691774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:29,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:29,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:29,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164795102] [2021-07-09 17:25:29,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:29,024 INFO L87 Difference]: Start difference. First operand 113 states and 316 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:29,159 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-07-09 17:25:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:29,159 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:29,160 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:25:29,160 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:25:29,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:25:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-07-09 17:25:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8073394495412844) internal successors, (306), 109 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-07-09 17:25:29,164 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-07-09 17:25:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:29,164 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-07-09 17:25:29,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-07-09 17:25:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:29,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:29,165 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:29,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,381 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1385320832, now seen corresponding path program 2 times [2021-07-09 17:25:29,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:29,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604127250] [2021-07-09 17:25:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:29,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:29,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604127250] [2021-07-09 17:25:29,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604127250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:29,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863858531] [2021-07-09 17:25:29,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:29,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863858531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:29,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:29,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533782514] [2021-07-09 17:25:29,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:29,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:29,600 INFO L87 Difference]: Start difference. First operand 110 states and 306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:29,745 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-07-09 17:25:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:29,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:29,747 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:25:29,747 INFO L226 Difference]: Without dead ends: 177 [2021-07-09 17:25:29,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-07-09 17:25:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-07-09 17:25:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.76271186440678) internal successors, (326), 118 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-07-09 17:25:29,754 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-07-09 17:25:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:29,754 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-07-09 17:25:29,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-07-09 17:25:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:29,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:29,754 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:29,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:25:29,963 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:29,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash 951223692, now seen corresponding path program 3 times [2021-07-09 17:25:29,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:29,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910238135] [2021-07-09 17:25:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:30,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:30,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910238135] [2021-07-09 17:25:30,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910238135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:30,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109141388] [2021-07-09 17:25:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:30,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:30,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:30,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109141388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:30,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:30,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 17:25:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366822014] [2021-07-09 17:25:30,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:30,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:30,114 INFO L87 Difference]: Start difference. First operand 119 states and 326 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:30,554 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-07-09 17:25:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:25:30,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:30,556 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:25:30,556 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:25:30,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:25:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-07-09 17:25:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-07-09 17:25:30,559 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-07-09 17:25:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:30,560 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-07-09 17:25:30,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-07-09 17:25:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:30,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:30,560 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:30,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:30,778 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash 479848854, now seen corresponding path program 1 times [2021-07-09 17:25:30,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:30,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560904675] [2021-07-09 17:25:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:30,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:30,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560904675] [2021-07-09 17:25:30,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560904675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:30,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431609117] [2021-07-09 17:25:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:30,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431609117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:30,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:30,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:30,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080944843] [2021-07-09 17:25:30,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:30,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:30,942 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:31,063 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-07-09 17:25:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:31,065 INFO L225 Difference]: With dead ends: 191 [2021-07-09 17:25:31,065 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:25:31,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:25:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-07-09 17:25:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.909090909090909) internal successors, (352), 121 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-07-09 17:25:31,068 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-07-09 17:25:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:31,069 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-07-09 17:25:31,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-07-09 17:25:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:31,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:31,069 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:31,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:25:31,285 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667084, now seen corresponding path program 2 times [2021-07-09 17:25:31,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:31,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698249023] [2021-07-09 17:25:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:31,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:31,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698249023] [2021-07-09 17:25:31,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698249023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:31,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033148837] [2021-07-09 17:25:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:31,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:31,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:31,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033148837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:31,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:31,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 17:25:31,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532272803] [2021-07-09 17:25:31,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:31,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:31,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:31,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:31,409 INFO L87 Difference]: Start difference. First operand 122 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:31,642 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-07-09 17:25:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:25:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:31,644 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:25:31,644 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:25:31,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:25:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-07-09 17:25:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.937007874015748) internal successors, (373), 127 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-07-09 17:25:31,654 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-07-09 17:25:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:31,654 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-07-09 17:25:31,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-07-09 17:25:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:31,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:31,656 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:31,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:25:31,869 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash 425707830, now seen corresponding path program 2 times [2021-07-09 17:25:31,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:31,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782741355] [2021-07-09 17:25:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:31,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782741355] [2021-07-09 17:25:31,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782741355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162811438] [2021-07-09 17:25:31,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:31,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:32,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162811438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:32,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:32,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:25:32,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763250414] [2021-07-09 17:25:32,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:32,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:32,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:32,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:32,024 INFO L87 Difference]: Start difference. First operand 128 states and 373 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:32,469 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-07-09 17:25:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:32,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:32,471 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:25:32,471 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:25:32,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:25:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-07-09 17:25:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-07-09 17:25:32,476 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-07-09 17:25:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:32,476 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-07-09 17:25:32,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-07-09 17:25:32,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:32,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:32,476 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:32,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:32,695 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1238287700, now seen corresponding path program 4 times [2021-07-09 17:25:32,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:32,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894951601] [2021-07-09 17:25:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:32,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:32,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894951601] [2021-07-09 17:25:32,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894951601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:32,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950154247] [2021-07-09 17:25:32,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:32,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:32,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:32,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950154247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:32,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:32,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:32,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797429231] [2021-07-09 17:25:32,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:32,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:32,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:32,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:32,879 INFO L87 Difference]: Start difference. First operand 143 states and 434 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:32,975 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-07-09 17:25:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:32,976 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:25:32,976 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:25:32,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:25:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-07-09 17:25:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-07-09 17:25:32,981 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-07-09 17:25:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:32,981 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-07-09 17:25:32,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-07-09 17:25:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:32,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:32,982 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:33,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:25:33,193 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1919639656, now seen corresponding path program 5 times [2021-07-09 17:25:33,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:33,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176693917] [2021-07-09 17:25:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:33,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:33,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176693917] [2021-07-09 17:25:33,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176693917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759834242] [2021-07-09 17:25:33,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:33,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:33,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:33,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759834242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:33,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:25:33,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091466140] [2021-07-09 17:25:33,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:33,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:33,325 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:33,434 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-07-09 17:25:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:33,435 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:25:33,435 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:25:33,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:25:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-07-09 17:25:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-07-09 17:25:33,441 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-07-09 17:25:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:33,441 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-07-09 17:25:33,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-07-09 17:25:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:33,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:33,441 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:33,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:33,657 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash 261780050, now seen corresponding path program 3 times [2021-07-09 17:25:33,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:33,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074826710] [2021-07-09 17:25:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:33,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074826710] [2021-07-09 17:25:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074826710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661496866] [2021-07-09 17:25:33,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:33,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:33,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:33,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661496866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:33,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 17:25:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735461810] [2021-07-09 17:25:33,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:33,791 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:34,221 INFO L93 Difference]: Finished difference Result 360 states and 970 transitions. [2021-07-09 17:25:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:25:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:34,222 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:25:34,222 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 17:25:34,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 17:25:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 169. [2021-07-09 17:25:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.011904761904762) internal successors, (506), 168 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 506 transitions. [2021-07-09 17:25:34,228 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 506 transitions. Word has length 15 [2021-07-09 17:25:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:34,229 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 506 transitions. [2021-07-09 17:25:34,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 506 transitions. [2021-07-09 17:25:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:34,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:34,229 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:34,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:34,445 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash 970590554, now seen corresponding path program 6 times [2021-07-09 17:25:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:34,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983076751] [2021-07-09 17:25:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:34,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:34,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983076751] [2021-07-09 17:25:34,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983076751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:34,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119588807] [2021-07-09 17:25:34,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:34,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:25:34,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:34,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119588807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:34,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:34,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 17:25:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146845843] [2021-07-09 17:25:34,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:34,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:34,594 INFO L87 Difference]: Start difference. First operand 169 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:35,078 INFO L93 Difference]: Finished difference Result 395 states and 1063 transitions. [2021-07-09 17:25:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:25:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:35,082 INFO L225 Difference]: With dead ends: 395 [2021-07-09 17:25:35,082 INFO L226 Difference]: Without dead ends: 351 [2021-07-09 17:25:35,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-09 17:25:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 188. [2021-07-09 17:25:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.128342245989305) internal successors, (585), 187 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 585 transitions. [2021-07-09 17:25:35,095 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 585 transitions. Word has length 15 [2021-07-09 17:25:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:35,095 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 585 transitions. [2021-07-09 17:25:35,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 585 transitions. [2021-07-09 17:25:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:35,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:35,097 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:35,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:25:35,314 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223272, now seen corresponding path program 3 times [2021-07-09 17:25:35,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:35,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79279094] [2021-07-09 17:25:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:35,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79279094] [2021-07-09 17:25:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79279094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:35,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858984306] [2021-07-09 17:25:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:35,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858984306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:35,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:35,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:25:35,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671085684] [2021-07-09 17:25:35,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:35,493 INFO L87 Difference]: Start difference. First operand 188 states and 585 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:35,894 INFO L93 Difference]: Finished difference Result 296 states and 839 transitions. [2021-07-09 17:25:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:35,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:35,897 INFO L225 Difference]: With dead ends: 296 [2021-07-09 17:25:35,897 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 17:25:35,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 17:25:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 185. [2021-07-09 17:25:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 3.1032608695652173) internal successors, (571), 184 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 571 transitions. [2021-07-09 17:25:35,903 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 571 transitions. Word has length 15 [2021-07-09 17:25:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:35,904 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 571 transitions. [2021-07-09 17:25:35,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 571 transitions. [2021-07-09 17:25:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:35,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:35,905 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:36,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:36,113 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:36,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1752078530, now seen corresponding path program 4 times [2021-07-09 17:25:36,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:36,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973286853] [2021-07-09 17:25:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:36,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:36,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973286853] [2021-07-09 17:25:36,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973286853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593328595] [2021-07-09 17:25:36,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:36,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:36,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593328595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:36,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:36,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:25:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163092891] [2021-07-09 17:25:36,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:36,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:36,236 INFO L87 Difference]: Start difference. First operand 185 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:36,319 INFO L93 Difference]: Finished difference Result 224 states and 652 transitions. [2021-07-09 17:25:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:36,321 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:25:36,321 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:25:36,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:25:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2021-07-09 17:25:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 3.083798882681564) internal successors, (552), 179 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 552 transitions. [2021-07-09 17:25:36,325 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 552 transitions. Word has length 15 [2021-07-09 17:25:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:36,326 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 552 transitions. [2021-07-09 17:25:36,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 552 transitions. [2021-07-09 17:25:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:36,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:36,326 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:36,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:25:36,544 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1743627284, now seen corresponding path program 7 times [2021-07-09 17:25:36,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:36,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982178652] [2021-07-09 17:25:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:36,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:36,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982178652] [2021-07-09 17:25:36,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982178652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:36,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176130568] [2021-07-09 17:25:36,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:36,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:36,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:36,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176130568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:36,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:36,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:25:36,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676724720] [2021-07-09 17:25:36,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:36,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:36,739 INFO L87 Difference]: Start difference. First operand 180 states and 552 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:36,852 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-07-09 17:25:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:36,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:36,854 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:25:36,854 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:25:36,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:25:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 178. [2021-07-09 17:25:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 3.0847457627118646) internal successors, (546), 177 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 546 transitions. [2021-07-09 17:25:36,859 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 546 transitions. Word has length 15 [2021-07-09 17:25:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:36,860 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 546 transitions. [2021-07-09 17:25:36,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 546 transitions. [2021-07-09 17:25:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:36,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:36,860 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:37,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:37,076 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1883825052, now seen corresponding path program 8 times [2021-07-09 17:25:37,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:37,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414989486] [2021-07-09 17:25:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414989486] [2021-07-09 17:25:37,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414989486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936831704] [2021-07-09 17:25:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:37,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936831704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:37,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 17:25:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952616667] [2021-07-09 17:25:37,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:37,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:37,246 INFO L87 Difference]: Start difference. First operand 178 states and 546 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:37,777 INFO L93 Difference]: Finished difference Result 322 states and 890 transitions. [2021-07-09 17:25:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:25:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:37,779 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:25:37,779 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 17:25:37,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 17:25:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 168. [2021-07-09 17:25:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0179640718562872) internal successors, (504), 167 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 504 transitions. [2021-07-09 17:25:37,785 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 504 transitions. Word has length 15 [2021-07-09 17:25:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:37,785 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 504 transitions. [2021-07-09 17:25:37,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 504 transitions. [2021-07-09 17:25:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:37,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:37,787 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:38,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:25:38,005 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2044993746, now seen corresponding path program 9 times [2021-07-09 17:25:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:38,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432724215] [2021-07-09 17:25:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:38,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432724215] [2021-07-09 17:25:38,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432724215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978809354] [2021-07-09 17:25:38,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:38,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:38,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978809354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:38,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:25:38,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288030923] [2021-07-09 17:25:38,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:38,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:38,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:38,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:38,222 INFO L87 Difference]: Start difference. First operand 168 states and 504 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:38,329 INFO L93 Difference]: Finished difference Result 251 states and 721 transitions. [2021-07-09 17:25:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:38,331 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:25:38,331 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:25:38,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:25:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-07-09 17:25:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 3.0180722891566263) internal successors, (501), 166 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 501 transitions. [2021-07-09 17:25:38,336 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 501 transitions. Word has length 15 [2021-07-09 17:25:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:38,336 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 501 transitions. [2021-07-09 17:25:38,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 501 transitions. [2021-07-09 17:25:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:38,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:38,337 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:38,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:38,553 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1908842768, now seen corresponding path program 4 times [2021-07-09 17:25:38,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:38,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654593479] [2021-07-09 17:25:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:38,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654593479] [2021-07-09 17:25:38,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654593479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189183725] [2021-07-09 17:25:38,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:38,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:38,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:38,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189183725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:38,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:25:38,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930393306] [2021-07-09 17:25:38,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:38,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:38,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:38,661 INFO L87 Difference]: Start difference. First operand 167 states and 501 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:38,746 INFO L93 Difference]: Finished difference Result 216 states and 623 transitions. [2021-07-09 17:25:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:38,747 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:25:38,747 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:25:38,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:25:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-07-09 17:25:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.953488372093023) internal successors, (508), 172 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 508 transitions. [2021-07-09 17:25:38,752 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 508 transitions. Word has length 15 [2021-07-09 17:25:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:38,752 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 508 transitions. [2021-07-09 17:25:38,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 508 transitions. [2021-07-09 17:25:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:38,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:38,753 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:38,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:38,969 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash -838645562, now seen corresponding path program 10 times [2021-07-09 17:25:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:38,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940350887] [2021-07-09 17:25:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:39,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940350887] [2021-07-09 17:25:39,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940350887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259823990] [2021-07-09 17:25:39,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:39,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:39,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259823990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:39,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:39,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961868251] [2021-07-09 17:25:39,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:39,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:39,113 INFO L87 Difference]: Start difference. First operand 173 states and 508 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:39,200 INFO L93 Difference]: Finished difference Result 216 states and 576 transitions. [2021-07-09 17:25:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:39,201 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:25:39,201 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:25:39,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:25:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2021-07-09 17:25:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.981818181818182) internal successors, (492), 165 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 492 transitions. [2021-07-09 17:25:39,205 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 492 transitions. Word has length 15 [2021-07-09 17:25:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:39,205 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 492 transitions. [2021-07-09 17:25:39,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 492 transitions. [2021-07-09 17:25:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:39,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:39,206 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:39,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:25:39,421 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1450061836, now seen corresponding path program 5 times [2021-07-09 17:25:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614916275] [2021-07-09 17:25:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614916275] [2021-07-09 17:25:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614916275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019900338] [2021-07-09 17:25:39,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:39,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:39,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019900338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:39,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:39,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507532318] [2021-07-09 17:25:39,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:39,558 INFO L87 Difference]: Start difference. First operand 166 states and 492 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:39,801 INFO L93 Difference]: Finished difference Result 232 states and 645 transitions. [2021-07-09 17:25:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:25:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:39,803 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:25:39,803 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:25:39,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:25:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-07-09 17:25:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.9430379746835444) internal successors, (465), 158 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 465 transitions. [2021-07-09 17:25:39,835 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 465 transitions. Word has length 15 [2021-07-09 17:25:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:39,835 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 465 transitions. [2021-07-09 17:25:39,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 465 transitions. [2021-07-09 17:25:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:39,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:39,837 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:40,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:40,053 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash -260492346, now seen corresponding path program 11 times [2021-07-09 17:25:40,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:40,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261590953] [2021-07-09 17:25:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:40,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261590953] [2021-07-09 17:25:40,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261590953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649136289] [2021-07-09 17:25:40,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:40,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649136289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:40,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:40,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701740808] [2021-07-09 17:25:40,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:40,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:40,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:40,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:40,196 INFO L87 Difference]: Start difference. First operand 159 states and 465 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:40,312 INFO L93 Difference]: Finished difference Result 214 states and 577 transitions. [2021-07-09 17:25:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:40,313 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:25:40,313 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:25:40,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:25:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 156. [2021-07-09 17:25:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9419354838709677) internal successors, (456), 155 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-07-09 17:25:40,318 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-07-09 17:25:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:40,318 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-07-09 17:25:40,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-07-09 17:25:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:40,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:40,318 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:40,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 17:25:40,519 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:40,519 INFO L82 PathProgramCache]: Analyzing trace with hash 738121340, now seen corresponding path program 6 times [2021-07-09 17:25:40,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:40,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82411980] [2021-07-09 17:25:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82411980] [2021-07-09 17:25:40,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82411980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295509589] [2021-07-09 17:25:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:40,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:25:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295509589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:40,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:25:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028247540] [2021-07-09 17:25:40,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:25:40,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:25:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:40,616 INFO L87 Difference]: Start difference. First operand 156 states and 456 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:40,688 INFO L93 Difference]: Finished difference Result 192 states and 534 transitions. [2021-07-09 17:25:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:40,689 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:25:40,689 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:25:40,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:25:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2021-07-09 17:25:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.927007299270073) internal successors, (401), 137 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 401 transitions. [2021-07-09 17:25:40,693 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 401 transitions. Word has length 15 [2021-07-09 17:25:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:40,693 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 401 transitions. [2021-07-09 17:25:40,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 401 transitions. [2021-07-09 17:25:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:40,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:40,693 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:40,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:40,905 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash -886595830, now seen corresponding path program 5 times [2021-07-09 17:25:40,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:40,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047275488] [2021-07-09 17:25:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:40,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047275488] [2021-07-09 17:25:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047275488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548575013] [2021-07-09 17:25:40,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:40,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548575013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:41,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:41,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290956351] [2021-07-09 17:25:41,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:41,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:41,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:41,047 INFO L87 Difference]: Start difference. First operand 138 states and 401 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:41,155 INFO L93 Difference]: Finished difference Result 165 states and 444 transitions. [2021-07-09 17:25:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:41,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:41,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:41,156 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:25:41,156 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:25:41,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:25:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-07-09 17:25:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9407407407407407) internal successors, (397), 135 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 397 transitions. [2021-07-09 17:25:41,159 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 397 transitions. Word has length 15 [2021-07-09 17:25:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:41,159 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 397 transitions. [2021-07-09 17:25:41,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 397 transitions. [2021-07-09 17:25:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:41,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:41,160 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:41,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,373 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:41,373 INFO L82 PathProgramCache]: Analyzing trace with hash 981607308, now seen corresponding path program 6 times [2021-07-09 17:25:41,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:41,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814421962] [2021-07-09 17:25:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:41,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814421962] [2021-07-09 17:25:41,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814421962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122705007] [2021-07-09 17:25:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:25:41,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122705007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:41,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 17:25:41,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887641256] [2021-07-09 17:25:41,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:41,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:41,503 INFO L87 Difference]: Start difference. First operand 136 states and 397 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:41,816 INFO L93 Difference]: Finished difference Result 223 states and 580 transitions. [2021-07-09 17:25:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:41,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:41,817 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:25:41,817 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:25:41,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:25:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 137. [2021-07-09 17:25:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.9558823529411766) internal successors, (402), 136 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 402 transitions. [2021-07-09 17:25:41,820 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 402 transitions. Word has length 15 [2021-07-09 17:25:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:41,821 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 402 transitions. [2021-07-09 17:25:41,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 402 transitions. [2021-07-09 17:25:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:41,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:41,821 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:42,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:25:42,037 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1341646634, now seen corresponding path program 7 times [2021-07-09 17:25:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539710817] [2021-07-09 17:25:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539710817] [2021-07-09 17:25:42,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539710817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607653510] [2021-07-09 17:25:42,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607653510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:42,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:25:42,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899290893] [2021-07-09 17:25:42,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:42,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:42,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:42,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:42,207 INFO L87 Difference]: Start difference. First operand 137 states and 402 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:42,302 INFO L93 Difference]: Finished difference Result 182 states and 485 transitions. [2021-07-09 17:25:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:42,303 INFO L225 Difference]: With dead ends: 182 [2021-07-09 17:25:42,303 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 17:25:42,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 17:25:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2021-07-09 17:25:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.9784172661870505) internal successors, (414), 139 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 414 transitions. [2021-07-09 17:25:42,306 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 414 transitions. Word has length 15 [2021-07-09 17:25:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:42,306 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 414 transitions. [2021-07-09 17:25:42,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 414 transitions. [2021-07-09 17:25:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:42,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:42,307 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:42,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:25:42,508 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1273184878, now seen corresponding path program 12 times [2021-07-09 17:25:42,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:42,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828384921] [2021-07-09 17:25:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:42,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828384921] [2021-07-09 17:25:42,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828384921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564829577] [2021-07-09 17:25:42,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:42,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:25:42,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564829577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:42,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:42,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245069422] [2021-07-09 17:25:42,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:42,638 INFO L87 Difference]: Start difference. First operand 140 states and 414 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:42,733 INFO L93 Difference]: Finished difference Result 222 states and 585 transitions. [2021-07-09 17:25:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:42,734 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:25:42,734 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:25:42,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:25:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-07-09 17:25:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.0141843971631204) internal successors, (425), 141 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 425 transitions. [2021-07-09 17:25:42,737 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 425 transitions. Word has length 15 [2021-07-09 17:25:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:42,738 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 425 transitions. [2021-07-09 17:25:42,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,738 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 425 transitions. [2021-07-09 17:25:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:42,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:42,738 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:42,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-09 17:25:42,955 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:42,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1876876436, now seen corresponding path program 8 times [2021-07-09 17:25:42,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:42,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725483963] [2021-07-09 17:25:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:42,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725483963] [2021-07-09 17:25:42,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725483963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112786530] [2021-07-09 17:25:42,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:43,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:43,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:43,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112786530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:43,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:43,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:43,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759461378] [2021-07-09 17:25:43,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:43,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:43,099 INFO L87 Difference]: Start difference. First operand 142 states and 425 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:43,192 INFO L93 Difference]: Finished difference Result 172 states and 476 transitions. [2021-07-09 17:25:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:43,193 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:25:43,193 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:25:43,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:25:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2021-07-09 17:25:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-07-09 17:25:43,198 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-07-09 17:25:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:43,198 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-07-09 17:25:43,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-07-09 17:25:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:43,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:43,199 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:43,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:25:43,413 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1270559102, now seen corresponding path program 13 times [2021-07-09 17:25:43,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:43,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956366099] [2021-07-09 17:25:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956366099] [2021-07-09 17:25:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956366099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365800245] [2021-07-09 17:25:43,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:43,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:43,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365800245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:43,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:43,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638357546] [2021-07-09 17:25:43,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:43,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:43,548 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:43,663 INFO L93 Difference]: Finished difference Result 205 states and 556 transitions. [2021-07-09 17:25:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:43,664 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:25:43,664 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:25:43,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:25:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2021-07-09 17:25:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9785714285714286) internal successors, (417), 140 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 417 transitions. [2021-07-09 17:25:43,669 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 417 transitions. Word has length 15 [2021-07-09 17:25:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:43,669 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 417 transitions. [2021-07-09 17:25:43,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 417 transitions. [2021-07-09 17:25:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:43,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:43,670 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:43,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 17:25:43,885 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 647834570, now seen corresponding path program 9 times [2021-07-09 17:25:43,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:43,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226868948] [2021-07-09 17:25:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:43,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:43,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226868948] [2021-07-09 17:25:43,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226868948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:43,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265857230] [2021-07-09 17:25:43,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:43,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:43,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265857230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:44,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 17:25:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362461429] [2021-07-09 17:25:44,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:44,017 INFO L87 Difference]: Start difference. First operand 141 states and 417 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:44,255 INFO L93 Difference]: Finished difference Result 220 states and 577 transitions. [2021-07-09 17:25:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:44,256 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:25:44,256 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 17:25:44,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:25:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 17:25:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-07-09 17:25:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.948148148148148) internal successors, (398), 135 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 398 transitions. [2021-07-09 17:25:44,260 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 398 transitions. Word has length 15 [2021-07-09 17:25:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:44,260 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 398 transitions. [2021-07-09 17:25:44,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 398 transitions. [2021-07-09 17:25:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:44,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:44,260 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:44,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:44,481 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash 716296326, now seen corresponding path program 14 times [2021-07-09 17:25:44,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:44,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963676065] [2021-07-09 17:25:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963676065] [2021-07-09 17:25:44,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963676065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321812753] [2021-07-09 17:25:44,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:44,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:44,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321812753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:44,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:44,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666088510] [2021-07-09 17:25:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:44,634 INFO L87 Difference]: Start difference. First operand 136 states and 398 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:44,729 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-07-09 17:25:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:44,730 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:25:44,730 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:25:44,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:25:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2021-07-09 17:25:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.9477611940298507) internal successors, (395), 134 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 395 transitions. [2021-07-09 17:25:44,733 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 395 transitions. Word has length 15 [2021-07-09 17:25:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:44,733 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 395 transitions. [2021-07-09 17:25:44,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 395 transitions. [2021-07-09 17:25:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:44,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:44,734 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:44,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:25:44,949 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash 209950060, now seen corresponding path program 15 times [2021-07-09 17:25:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:44,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706960100] [2021-07-09 17:25:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:44,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706960100] [2021-07-09 17:25:44,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706960100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475375332] [2021-07-09 17:25:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:45,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475375332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:45,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:25:45,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654304164] [2021-07-09 17:25:45,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:45,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:45,076 INFO L87 Difference]: Start difference. First operand 135 states and 395 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:45,168 INFO L93 Difference]: Finished difference Result 197 states and 527 transitions. [2021-07-09 17:25:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:45,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:45,169 INFO L225 Difference]: With dead ends: 197 [2021-07-09 17:25:45,169 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:25:45,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:25:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2021-07-09 17:25:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.9473684210526314) internal successors, (392), 133 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2021-07-09 17:25:45,171 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 15 [2021-07-09 17:25:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:45,171 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2021-07-09 17:25:45,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2021-07-09 17:25:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:45,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:45,172 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:45,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,388 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash 524208692, now seen corresponding path program 10 times [2021-07-09 17:25:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169773632] [2021-07-09 17:25:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:45,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169773632] [2021-07-09 17:25:45,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169773632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278796899] [2021-07-09 17:25:45,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:45,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:45,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278796899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:45,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:45,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965409599] [2021-07-09 17:25:45,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:45,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:45,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:45,501 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:45,603 INFO L93 Difference]: Finished difference Result 180 states and 469 transitions. [2021-07-09 17:25:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:45,604 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:25:45,604 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:25:45,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:25:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-07-09 17:25:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.946969696969697) internal successors, (389), 132 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 389 transitions. [2021-07-09 17:25:45,607 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 389 transitions. Word has length 15 [2021-07-09 17:25:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:45,607 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 389 transitions. [2021-07-09 17:25:45,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 389 transitions. [2021-07-09 17:25:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:45,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:45,607 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:45,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:25:45,825 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash 22578118, now seen corresponding path program 11 times [2021-07-09 17:25:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:45,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469034315] [2021-07-09 17:25:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:45,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469034315] [2021-07-09 17:25:45,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469034315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755281397] [2021-07-09 17:25:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:45,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755281397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:45,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:25:45,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912172607] [2021-07-09 17:25:45,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:45,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:45,916 INFO L87 Difference]: Start difference. First operand 133 states and 389 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:45,986 INFO L93 Difference]: Finished difference Result 154 states and 429 transitions. [2021-07-09 17:25:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:45,987 INFO L225 Difference]: With dead ends: 154 [2021-07-09 17:25:45,987 INFO L226 Difference]: Without dead ends: 130 [2021-07-09 17:25:45,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-09 17:25:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-07-09 17:25:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.9224806201550386) internal successors, (377), 129 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 377 transitions. [2021-07-09 17:25:45,990 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 377 transitions. Word has length 15 [2021-07-09 17:25:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:45,990 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 377 transitions. [2021-07-09 17:25:45,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 377 transitions. [2021-07-09 17:25:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:45,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:45,990 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:46,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:25:46,205 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash 212575836, now seen corresponding path program 16 times [2021-07-09 17:25:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:46,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214991813] [2021-07-09 17:25:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:46,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214991813] [2021-07-09 17:25:46,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214991813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632726790] [2021-07-09 17:25:46,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:46,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:46,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:46,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:25:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:46,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632726790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:46,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:46,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:46,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625812229] [2021-07-09 17:25:46,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:46,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:46,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:46,333 INFO L87 Difference]: Start difference. First operand 130 states and 377 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:46,428 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-07-09 17:25:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:25:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:46,429 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:25:46,429 INFO L226 Difference]: Without dead ends: 169 [2021-07-09 17:25:46,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-09 17:25:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2021-07-09 17:25:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.9237288135593222) internal successors, (345), 118 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 345 transitions. [2021-07-09 17:25:46,432 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 345 transitions. Word has length 15 [2021-07-09 17:25:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:46,432 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 345 transitions. [2021-07-09 17:25:46,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 345 transitions. [2021-07-09 17:25:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:25:46,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:46,432 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:46,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:46,642 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash 907579970, now seen corresponding path program 1 times [2021-07-09 17:25:46,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:46,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452742223] [2021-07-09 17:25:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:46,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452742223] [2021-07-09 17:25:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452742223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116367924] [2021-07-09 17:25:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:46,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116367924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:46,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:46,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 17:25:46,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387659106] [2021-07-09 17:25:46,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:46,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:46,754 INFO L87 Difference]: Start difference. First operand 119 states and 345 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:46,831 INFO L93 Difference]: Finished difference Result 161 states and 443 transitions. [2021-07-09 17:25:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:46,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:25:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:46,832 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:25:46,833 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:25:46,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:25:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-07-09 17:25:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.926829268292683) internal successors, (360), 123 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 360 transitions. [2021-07-09 17:25:46,835 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 360 transitions. Word has length 16 [2021-07-09 17:25:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:46,835 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 360 transitions. [2021-07-09 17:25:46,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 360 transitions. [2021-07-09 17:25:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:25:46,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:46,836 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:47,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 17:25:47,052 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279832, now seen corresponding path program 2 times [2021-07-09 17:25:47,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:47,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641292176] [2021-07-09 17:25:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:47,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641292176] [2021-07-09 17:25:47,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641292176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448371886] [2021-07-09 17:25:47,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:47,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:47,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448371886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:47,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:25:47,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112671403] [2021-07-09 17:25:47,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:25:47,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:25:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:25:47,168 INFO L87 Difference]: Start difference. First operand 124 states and 360 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:47,227 INFO L93 Difference]: Finished difference Result 156 states and 442 transitions. [2021-07-09 17:25:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:25:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:25:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:47,229 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:25:47,233 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:25:47,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:47,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:25:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-07-09 17:25:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-07-09 17:25:47,235 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-07-09 17:25:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:47,235 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-07-09 17:25:47,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-07-09 17:25:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:25:47,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:47,236 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:47,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,447 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1638627788, now seen corresponding path program 1 times [2021-07-09 17:25:47,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:47,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961459741] [2021-07-09 17:25:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:47,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961459741] [2021-07-09 17:25:47,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961459741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339470726] [2021-07-09 17:25:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:25:47,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:47,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:47,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:47,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:47,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:47,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:47,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:47,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:47,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:47,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:47,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:47,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:47,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:47,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:47,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:25:48,019 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:123, output treesize:111 [2021-07-09 17:25:48,372 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-07-09 17:25:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:25:48,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:25:48,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:25:48,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:48,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:25:48,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:48,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:48,423 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:48,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:48,432 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:48,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:48,450 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:25:48,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:48,466 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,739 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2021-07-09 17:25:48,741 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-07-09 17:25:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:48,751 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:48,760 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:25:48,778 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:25:48,786 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:25:48,793 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:25:48,801 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:25:48,829 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:48,846 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:48,852 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:25:48,869 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:48,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:25:48,875 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:48,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,989 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 17:25:48,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:25:48,995 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 7 variables, input treesize:419, output treesize:179 [2021-07-09 17:25:49,144 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:25:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339470726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:49,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:25:49,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70655465] [2021-07-09 17:25:49,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:25:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:25:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:49,246 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,082 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-07-09 17:25:50,329 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-07-09 17:25:50,519 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-07-09 17:25:50,770 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-07-09 17:25:51,061 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 115 [2021-07-09 17:25:51,285 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2021-07-09 17:25:51,544 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2021-07-09 17:25:51,821 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2021-07-09 17:25:52,062 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 110 [2021-07-09 17:25:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:52,132 INFO L93 Difference]: Finished difference Result 294 states and 803 transitions. [2021-07-09 17:25:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:25:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:25:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:52,133 INFO L225 Difference]: With dead ends: 294 [2021-07-09 17:25:52,134 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:25:52,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2872.4ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:25:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-07-09 17:25:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-07-09 17:25:52,137 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 17 [2021-07-09 17:25:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:52,137 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-07-09 17:25:52,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-07-09 17:25:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:25:52,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:52,138 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:52,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:52,347 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash -310438566, now seen corresponding path program 2 times [2021-07-09 17:25:52,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:52,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059500388] [2021-07-09 17:25:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:52,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:52,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059500388] [2021-07-09 17:25:52,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059500388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:52,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246005693] [2021-07-09 17:25:52,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:52,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:52,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:25:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:52,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:52,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:52,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:52,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:52,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,085 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-07-09 17:25:53,085 INFO L628 ElimStorePlain]: treesize reduction 35, result has 80.7 percent of original size [2021-07-09 17:25:53,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:53,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:53,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:53,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:53,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-07-09 17:25:53,187 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:195, output treesize:141 [2021-07-09 17:25:53,392 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_19, array_4, v_prenex_17], 1=[array_0, v_prenex_18, v_prenex_16]} [2021-07-09 17:25:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:53,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:25:53,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,505 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-07-09 17:25:53,506 INFO L628 ElimStorePlain]: treesize reduction 31, result has 86.1 percent of original size [2021-07-09 17:25:53,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:53,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:53,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:53,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:25:53,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:25:53,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:25:53,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:53,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:53,637 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:53,694 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:25:53,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:25:53,745 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:25:53,749 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:25:53,754 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:53,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:25:53,762 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:25:53,804 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 9 variables, input treesize:237, output treesize:57 [2021-07-09 17:25:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246005693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:53,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:53,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:25:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709695658] [2021-07-09 17:25:53,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:25:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:25:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:53,850 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,232 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-09 17:25:54,435 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-07-09 17:25:54,609 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-07-09 17:25:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:54,796 INFO L93 Difference]: Finished difference Result 229 states and 646 transitions. [2021-07-09 17:25:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:25:54,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:25:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:54,798 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:25:54,798 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:25:54,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1088.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:25:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2021-07-09 17:25:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.9183673469387754) internal successors, (429), 147 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2021-07-09 17:25:54,801 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 17 [2021-07-09 17:25:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:54,801 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2021-07-09 17:25:54,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2021-07-09 17:25:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:25:54,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:54,801 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:55,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-07-09 17:25:55,021 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1170799304, now seen corresponding path program 3 times [2021-07-09 17:25:55,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:55,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148686174] [2021-07-09 17:25:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:55,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148686174] [2021-07-09 17:25:55,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148686174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369455716] [2021-07-09 17:25:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:55,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:25:55,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:25:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:55,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:55,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:55,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:55,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:55,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:55,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:55,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:55,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:55,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:55,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:55,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:55,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:25:55,757 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-07-09 17:25:55,975 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_32, v_prenex_30, array_4, v_prenex_36, v_prenex_34], 1=[v_prenex_31, array_2, v_prenex_35, v_prenex_33, v_prenex_29]} [2021-07-09 17:25:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:25:55,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:25:55,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:25:55,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:25:55,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,200 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-07-09 17:25:56,201 INFO L628 ElimStorePlain]: treesize reduction 141, result has 58.0 percent of original size [2021-07-09 17:25:56,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:25:56,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:25:56,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:25:56,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:56,363 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:56,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:25:56,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:25:56,424 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:56,429 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:56,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,478 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:25:56,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_35 vanished before elimination [2021-07-09 17:25:56,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:25:56,483 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:25:56,488 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:56,542 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:56,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:56,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:25:56,589 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 15 variables, input treesize:364, output treesize:62 [2021-07-09 17:25:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:56,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369455716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:56,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:56,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:25:56,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490176943] [2021-07-09 17:25:56,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:25:56,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:25:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:25:56,642 INFO L87 Difference]: Start difference. First operand 148 states and 429 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,988 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-09 17:25:57,166 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-07-09 17:25:57,455 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 118 [2021-07-09 17:25:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:57,611 INFO L93 Difference]: Finished difference Result 228 states and 644 transitions. [2021-07-09 17:25:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:25:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:25:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:57,622 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:25:57,622 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:25:57,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1151.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:25:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2021-07-09 17:25:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.9072847682119205) internal successors, (439), 151 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 439 transitions. [2021-07-09 17:25:57,625 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 439 transitions. Word has length 17 [2021-07-09 17:25:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:57,625 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 439 transitions. [2021-07-09 17:25:57,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 439 transitions. [2021-07-09 17:25:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:25:57,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:57,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:57,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:57,829 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 227417012, now seen corresponding path program 4 times [2021-07-09 17:25:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:57,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924061316] [2021-07-09 17:25:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:58,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924061316] [2021-07-09 17:25:58,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924061316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610708432] [2021-07-09 17:25:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:58,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:58,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:25:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:58,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:58,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:58,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:58,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:58,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:58,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:25:58,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-07-09 17:25:58,615 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:25:58,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:25:58,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:25:58,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:58,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:25:58,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:58,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:58,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:25:58,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:58,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:25:58,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:25:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:25:58,667 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:25:58,674 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:25:58,680 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-07-09 17:25:58,918 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-07-09 17:25:58,918 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-07-09 17:25:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:58,933 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:58,938 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:25:58,951 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:25:58,956 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:25:58,961 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:25:58,973 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:25:58,978 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:58,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:25:58,996 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:59,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:59,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:25:59,001 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:59,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:59,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:25:59,029 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:25:59,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:25:59,034 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:59,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:59,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:25:59,137 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-07-09 17:25:59,290 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:25:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610708432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:25:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272320130] [2021-07-09 17:25:59,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:25:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:25:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:59,371 INFO L87 Difference]: Start difference. First operand 152 states and 439 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,043 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-07-09 17:26:00,224 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-07-09 17:26:00,380 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-07-09 17:26:00,553 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 17:26:00,747 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 17:26:00,904 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-09 17:26:01,093 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-09 17:26:01,294 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-07-09 17:26:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:01,347 INFO L93 Difference]: Finished difference Result 261 states and 746 transitions. [2021-07-09 17:26:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:01,348 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:26:01,348 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 17:26:01,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2107.1ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 17:26:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 158. [2021-07-09 17:26:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-07-09 17:26:01,352 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-07-09 17:26:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:01,352 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-07-09 17:26:01,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-07-09 17:26:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:01,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:01,352 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:01,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,561 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1708654882, now seen corresponding path program 5 times [2021-07-09 17:26:01,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:01,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684761582] [2021-07-09 17:26:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684761582] [2021-07-09 17:26:01,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684761582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376634030] [2021-07-09 17:26:01,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:01,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:01,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:01,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:01,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:01,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:01,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:01,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:01,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:01,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:01,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:01,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:02,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:02,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:02,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:175, output treesize:235 [2021-07-09 17:26:02,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:02,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:02,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:26:02,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:02,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:26:02,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:26:02,352 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:02,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:02,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,560 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-07-09 17:26:02,561 INFO L628 ElimStorePlain]: treesize reduction 238, result has 53.4 percent of original size [2021-07-09 17:26:02,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:02,566 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:02,646 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:02,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:02,731 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:02,735 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,826 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:26:02,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:02,831 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:02,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:02,859 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:02,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:02,864 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:02,869 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:02,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:02,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:02,950 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:03,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:03,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:03,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:03,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:03,031 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:03,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:03,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:03,036 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:03,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:03,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:03,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:03,130 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-07-09 17:26:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:03,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376634030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:03,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:03,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797287505] [2021-07-09 17:26:03,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:03,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:03,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:03,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:03,306 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,159 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-07-09 17:26:04,492 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 107 [2021-07-09 17:26:04,664 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-07-09 17:26:04,855 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 17:26:05,070 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 17:26:05,271 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-07-09 17:26:05,504 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-09 17:26:05,735 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-09 17:26:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,798 INFO L93 Difference]: Finished difference Result 275 states and 766 transitions. [2021-07-09 17:26:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:05,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,800 INFO L225 Difference]: With dead ends: 275 [2021-07-09 17:26:05,800 INFO L226 Difference]: Without dead ends: 267 [2021-07-09 17:26:05,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2455.7ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-09 17:26:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 161. [2021-07-09 17:26:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.93125) internal successors, (469), 160 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 469 transitions. [2021-07-09 17:26:05,803 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 469 transitions. Word has length 17 [2021-07-09 17:26:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,803 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 469 transitions. [2021-07-09 17:26:05,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 469 transitions. [2021-07-09 17:26:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:05,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,804 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,021 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1137200076, now seen corresponding path program 6 times [2021-07-09 17:26:06,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134535641] [2021-07-09 17:26:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134535641] [2021-07-09 17:26:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134535641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544828714] [2021-07-09 17:26:06,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:06,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:06,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:06,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:06,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:06,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:06,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:06,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:06,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:06,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:06,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:06,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:06,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:06,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:06,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:06,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:06,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:26:06,630 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:169, output treesize:145 [2021-07-09 17:26:06,919 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_72, v_prenex_70, v_prenex_64, array_4, v_prenex_68, v_prenex_66], 1=[v_prenex_71, v_prenex_65, array_2, v_prenex_63, v_prenex_69, v_prenex_67]} [2021-07-09 17:26:06,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:26:06,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:06,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:06,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,166 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-07-09 17:26:07,167 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.6 percent of original size [2021-07-09 17:26:07,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:07,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:07,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:07,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:07,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:07,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:07,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:07,425 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:07,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:07,484 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:07,540 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:07,544 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,592 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:26:07,592 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-07-09 17:26:07,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:07,597 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:07,650 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:07,654 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:07,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:07,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:26:07,711 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-07-09 17:26:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544828714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:07,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294569082] [2021-07-09 17:26:07,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:07,767 INFO L87 Difference]: Start difference. First operand 161 states and 469 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,374 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2021-07-09 17:26:08,946 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 134 [2021-07-09 17:26:09,283 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-09 17:26:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:09,356 INFO L93 Difference]: Finished difference Result 281 states and 779 transitions. [2021-07-09 17:26:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:09,357 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:26:09,357 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:26:09,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1723.6ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:26:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2021-07-09 17:26:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9156626506024095) internal successors, (484), 166 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 484 transitions. [2021-07-09 17:26:09,360 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 484 transitions. Word has length 17 [2021-07-09 17:26:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:09,360 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 484 transitions. [2021-07-09 17:26:09,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 484 transitions. [2021-07-09 17:26:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:09,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:09,361 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:09,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-09 17:26:09,573 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:09,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1272047358, now seen corresponding path program 7 times [2021-07-09 17:26:09,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:09,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294997636] [2021-07-09 17:26:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:09,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294997636] [2021-07-09 17:26:09,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294997636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115256192] [2021-07-09 17:26:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:10,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:10,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:10,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:10,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:10,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:10,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:10,181 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-07-09 17:26:10,417 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:26:10,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:10,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:10,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:10,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:10,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:10,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:10,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:26:10,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:10,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:10,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:10,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:10,465 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:10,472 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:10,477 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,718 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-07-09 17:26:10,719 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-07-09 17:26:10,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:10,724 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:10,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:10,749 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:10,754 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:10,760 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:10,773 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:10,778 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:10,790 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:26:10,795 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:10,800 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:26:10,811 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:10,919 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 17:26:10,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:10,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:10,923 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-07-09 17:26:11,062 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:26:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115256192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:11,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:11,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343877091] [2021-07-09 17:26:11,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:11,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:11,127 INFO L87 Difference]: Start difference. First operand 167 states and 484 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,759 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-07-09 17:26:11,938 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 17:26:12,112 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-09 17:26:12,312 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-09 17:26:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:12,397 INFO L93 Difference]: Finished difference Result 290 states and 824 transitions. [2021-07-09 17:26:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:12,398 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:26:12,398 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:26:12,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1402.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:26:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 170. [2021-07-09 17:26:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9171597633136095) internal successors, (493), 169 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 493 transitions. [2021-07-09 17:26:12,402 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 493 transitions. Word has length 17 [2021-07-09 17:26:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:12,402 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 493 transitions. [2021-07-09 17:26:12,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 493 transitions. [2021-07-09 17:26:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:12,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:12,402 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:12,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-09 17:26:12,613 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1541682068, now seen corresponding path program 8 times [2021-07-09 17:26:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:12,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690495342] [2021-07-09 17:26:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:12,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690495342] [2021-07-09 17:26:12,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690495342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225621145] [2021-07-09 17:26:12,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:12,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:12,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:12,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:12,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:12,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:12,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:12,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:12,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:13,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:13,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:239 [2021-07-09 17:26:13,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:13,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:26:13,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,519 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-07-09 17:26:13,520 INFO L628 ElimStorePlain]: treesize reduction 196, result has 65.9 percent of original size [2021-07-09 17:26:13,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:13,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:13,649 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 17:26:13,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:13,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:13,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,769 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 17:26:13,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:13,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:13,881 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 17:26:13,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:13,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:13,887 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:13,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:13,898 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:26:13,904 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:26:13,910 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:13,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:13,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:13,915 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,080 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-07-09 17:26:14,081 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.0 percent of original size [2021-07-09 17:26:14,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:14,087 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:14,093 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:14,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:14,187 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:14,191 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:14,196 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:14,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:14,201 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:14,205 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:14,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:14,279 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-07-09 17:26:14,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:14,282 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:621, output treesize:139 [2021-07-09 17:26:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225621145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:14,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951486785] [2021-07-09 17:26:14,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:14,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:14,421 INFO L87 Difference]: Start difference. First operand 170 states and 493 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,975 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-07-09 17:26:15,201 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-09 17:26:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:15,276 INFO L93 Difference]: Finished difference Result 272 states and 776 transitions. [2021-07-09 17:26:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:26:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:15,277 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:26:15,277 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:26:15,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:26:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 167. [2021-07-09 17:26:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-07-09 17:26:15,283 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-07-09 17:26:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:15,283 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-07-09 17:26:15,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-07-09 17:26:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:15,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:15,284 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:15,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,500 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -598492624, now seen corresponding path program 9 times [2021-07-09 17:26:15,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:15,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218826246] [2021-07-09 17:26:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:15,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218826246] [2021-07-09 17:26:15,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218826246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969601185] [2021-07-09 17:26:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:15,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:15,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:15,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:15,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:15,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:15,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:15,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:15,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:15,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:15,936 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:171, output treesize:231 [2021-07-09 17:26:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:16,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:26:16,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,539 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 132 [2021-07-09 17:26:16,539 INFO L628 ElimStorePlain]: treesize reduction 198, result has 65.9 percent of original size [2021-07-09 17:26:16,540 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:26:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:16,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:16,669 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 17:26:16,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:16,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:16,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:16,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:16,808 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-09 17:26:16,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:16,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:16,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:16,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:16,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:16,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,037 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2021-07-09 17:26:17,038 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-07-09 17:26:17,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:26:17,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,150 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 17:26:17,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:17,162 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:17,168 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,276 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 17:26:17,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:17,284 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:17,291 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,483 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-07-09 17:26:17,484 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.5 percent of original size [2021-07-09 17:26:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:17,490 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:17,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:17,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:17,598 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:17,707 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,809 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-09 17:26:17,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:17,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:17,816 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:17,998 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-07-09 17:26:17,998 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.0 percent of original size [2021-07-09 17:26:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:18,004 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:18,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:18,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:18,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:18,098 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:18,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:18,102 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:18,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:18,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:26:18,200 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 21 variables, input treesize:629, output treesize:167 [2021-07-09 17:26:18,365 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-07-09 17:26:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969601185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:18,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:18,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836402881] [2021-07-09 17:26:18,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:18,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:18,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:18,494 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,161 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-07-09 17:26:19,529 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2021-07-09 17:26:19,957 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 115 [2021-07-09 17:26:20,265 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2021-07-09 17:26:20,642 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 135 [2021-07-09 17:26:21,003 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 132 [2021-07-09 17:26:21,375 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 138 [2021-07-09 17:26:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,489 INFO L93 Difference]: Finished difference Result 379 states and 1027 transitions. [2021-07-09 17:26:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,491 INFO L225 Difference]: With dead ends: 379 [2021-07-09 17:26:21,491 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:26:21,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2894.3ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:26:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 168. [2021-07-09 17:26:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.970059880239521) internal successors, (496), 167 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 496 transitions. [2021-07-09 17:26:21,494 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 496 transitions. Word has length 17 [2021-07-09 17:26:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:21,494 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 496 transitions. [2021-07-09 17:26:21,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 496 transitions. [2021-07-09 17:26:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:21,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:21,495 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:21,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 17:26:21,701 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1539622738, now seen corresponding path program 10 times [2021-07-09 17:26:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:21,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283529606] [2021-07-09 17:26:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283529606] [2021-07-09 17:26:21,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283529606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667056508] [2021-07-09 17:26:21,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:21,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:22,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:22,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:22,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:22,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:22,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:22,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:22,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:22,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:26:22,475 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-07-09 17:26:22,736 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_119, array_4, v_prenex_121, v_prenex_115, v_prenex_117], 1=[v_prenex_118, array_2, v_prenex_120, v_prenex_114, v_prenex_116]} [2021-07-09 17:26:22,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:22,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:22,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:22,898 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-07-09 17:26:22,898 INFO L628 ElimStorePlain]: treesize reduction 137, result has 61.8 percent of original size [2021-07-09 17:26:22,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:22,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:22,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:22,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:22,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:23,040 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:26:23,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:23,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:23,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:23,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,183 INFO L518 ElimStorePlain]: Eliminatee v_prenex_118 vanished before elimination [2021-07-09 17:26:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:23,188 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:23,192 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,247 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-07-09 17:26:23,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:23,251 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:23,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:23,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:23,312 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:23,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:23,316 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:23,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:23,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:26:23,364 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-07-09 17:26:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:23,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667056508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:23,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:23,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436130366] [2021-07-09 17:26:23,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:23,422 INFO L87 Difference]: Start difference. First operand 168 states and 496 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,152 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-09 17:26:24,547 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 109 [2021-07-09 17:26:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:24,705 INFO L93 Difference]: Finished difference Result 276 states and 775 transitions. [2021-07-09 17:26:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:24,707 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:26:24,707 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:26:24,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1465.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:26:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 165. [2021-07-09 17:26:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.9695121951219514) internal successors, (487), 164 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 487 transitions. [2021-07-09 17:26:24,710 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 487 transitions. Word has length 17 [2021-07-09 17:26:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:24,710 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 487 transitions. [2021-07-09 17:26:24,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 487 transitions. [2021-07-09 17:26:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:24,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:24,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:24,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-09 17:26:24,925 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1020683452, now seen corresponding path program 11 times [2021-07-09 17:26:24,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:24,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922198746] [2021-07-09 17:26:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922198746] [2021-07-09 17:26:25,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922198746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680546097] [2021-07-09 17:26:25,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:25,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:25,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:25,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:25,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:25,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:25,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:25,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:25,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:26:25,802 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_130, array_4, v_prenex_132, v_prenex_134, v_prenex_136, v_prenex_138], 1=[v_prenex_129, array_2, v_prenex_131, v_prenex_133, v_prenex_135, v_prenex_137]} [2021-07-09 17:26:25,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:25,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:26:25,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,018 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-07-09 17:26:26,018 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.6 percent of original size [2021-07-09 17:26:26,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:26,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:26,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:26,093 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:26,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:26,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:26,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:26,262 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:26,318 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:26,322 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:26,377 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:26,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:26,435 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:26,439 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:26,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:26,496 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:26,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:26,542 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-07-09 17:26:26,542 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-07-09 17:26:26,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:26:26,550 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-07-09 17:26:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680546097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:26,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:26,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295876808] [2021-07-09 17:26:26,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:26,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:26,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:26,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:26,596 INFO L87 Difference]: Start difference. First operand 165 states and 487 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,056 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-09 17:26:27,396 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2021-07-09 17:26:27,641 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-07-09 17:26:28,191 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 131 [2021-07-09 17:26:28,578 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2021-07-09 17:26:28,802 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-07-09 17:26:29,193 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2021-07-09 17:26:29,560 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-07-09 17:26:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:29,666 INFO L93 Difference]: Finished difference Result 339 states and 928 transitions. [2021-07-09 17:26:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:29,667 INFO L225 Difference]: With dead ends: 339 [2021-07-09 17:26:29,667 INFO L226 Difference]: Without dead ends: 331 [2021-07-09 17:26:29,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3175.7ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-09 17:26:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 161. [2021-07-09 17:26:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.94375) internal successors, (471), 160 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2021-07-09 17:26:29,670 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 17 [2021-07-09 17:26:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:29,670 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2021-07-09 17:26:29,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2021-07-09 17:26:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:29,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:29,671 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:29,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-09 17:26:29,871 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1496339310, now seen corresponding path program 12 times [2021-07-09 17:26:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:29,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402969960] [2021-07-09 17:26:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402969960] [2021-07-09 17:26:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402969960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310151774] [2021-07-09 17:26:30,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:30,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:26:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:30,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:30,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:30,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:30,392 INFO L628 ElimStorePlain]: treesize reduction 32, result has 82.1 percent of original size [2021-07-09 17:26:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:30,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,430 INFO L628 ElimStorePlain]: treesize reduction 82, result has 41.4 percent of original size [2021-07-09 17:26:30,430 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-07-09 17:26:30,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:26:30,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:58 [2021-07-09 17:26:30,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:30,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:30,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:30,646 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-07-09 17:26:30,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:30,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:30,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:30,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:30,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:30,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:30,758 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:30,807 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:30,811 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:26:30,845 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:30,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:30,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:30,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:30,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:26:30,879 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-07-09 17:26:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310151774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:30,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:26:30,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084660810] [2021-07-09 17:26:30,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:30,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:30,921 INFO L87 Difference]: Start difference. First operand 161 states and 471 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:31,536 INFO L93 Difference]: Finished difference Result 223 states and 624 transitions. [2021-07-09 17:26:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:31,537 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:26:31,537 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:26:31,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:26:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-07-09 17:26:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.946107784431138) internal successors, (492), 167 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 492 transitions. [2021-07-09 17:26:31,540 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 492 transitions. Word has length 17 [2021-07-09 17:26:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:31,540 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 492 transitions. [2021-07-09 17:26:31,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 492 transitions. [2021-07-09 17:26:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:31,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:31,541 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:31,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,741 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash 849561632, now seen corresponding path program 13 times [2021-07-09 17:26:31,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:31,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422829462] [2021-07-09 17:26:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422829462] [2021-07-09 17:26:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422829462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861189166] [2021-07-09 17:26:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:32,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:32,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:32,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:32,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:32,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:32,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:32,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-07-09 17:26:32,515 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:26:32,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:32,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:32,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:32,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:32,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:32,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:32,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:32,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:32,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:32,562 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:26:32,568 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:32,573 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,800 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-07-09 17:26:32,801 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-07-09 17:26:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:32,806 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:32,811 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:26:32,829 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:26:32,834 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:32,839 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:32,851 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:32,856 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:32,862 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:32,868 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:32,880 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:32,884 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:32,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:32,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:32,989 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-07-09 17:26:33,130 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:26:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:33,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861189166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:33,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:33,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314181963] [2021-07-09 17:26:33,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:33,198 INFO L87 Difference]: Start difference. First operand 168 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:34,049 INFO L93 Difference]: Finished difference Result 217 states and 631 transitions. [2021-07-09 17:26:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:34,050 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:26:34,050 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:26:34,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1000.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:26:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-07-09 17:26:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.947058823529412) internal successors, (501), 170 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 501 transitions. [2021-07-09 17:26:34,053 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 501 transitions. Word has length 17 [2021-07-09 17:26:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:34,053 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 501 transitions. [2021-07-09 17:26:34,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 501 transitions. [2021-07-09 17:26:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:34,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:34,054 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:34,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-09 17:26:34,257 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1964167794, now seen corresponding path program 14 times [2021-07-09 17:26:34,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:34,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108896047] [2021-07-09 17:26:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:34,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108896047] [2021-07-09 17:26:34,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108896047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791307206] [2021-07-09 17:26:34,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:34,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:34,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:34,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:34,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:34,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:34,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:34,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:34,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:34,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:34,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:183, output treesize:243 [2021-07-09 17:26:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:34,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:26:34,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:34,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:34,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:26:34,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:34,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:34,961 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:34,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:26:34,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,166 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-07-09 17:26:35,167 INFO L628 ElimStorePlain]: treesize reduction 253, result has 53.0 percent of original size [2021-07-09 17:26:35,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:35,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:35,177 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:35,182 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:35,189 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:35,193 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:35,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:35,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:35,361 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:35,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:35,457 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:35,475 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:35,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:35,575 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:35,579 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:35,670 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:35,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:35,746 INFO L518 ElimStorePlain]: Eliminatee v_prenex_159 vanished before elimination [2021-07-09 17:26:35,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:35,750 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-07-09 17:26:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791307206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:35,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:35,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604472895] [2021-07-09 17:26:35,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:35,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:35,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:35,923 INFO L87 Difference]: Start difference. First operand 171 states and 501 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,721 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2021-07-09 17:26:36,984 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-07-09 17:26:37,183 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 116 [2021-07-09 17:26:37,381 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 17:26:37,798 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 17:26:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:37,870 INFO L93 Difference]: Finished difference Result 237 states and 659 transitions. [2021-07-09 17:26:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:37,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:37,871 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:26:37,871 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:26:37,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1876.1ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:26:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 169. [2021-07-09 17:26:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.982142857142857) internal successors, (501), 168 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-07-09 17:26:37,874 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-07-09 17:26:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:37,874 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-07-09 17:26:37,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-07-09 17:26:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:37,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:37,875 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:38,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,094 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:38,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1751800366, now seen corresponding path program 15 times [2021-07-09 17:26:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:38,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027573090] [2021-07-09 17:26:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:38,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027573090] [2021-07-09 17:26:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027573090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728198202] [2021-07-09 17:26:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:26:38,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:38,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:38,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:38,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:38,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:38,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:38,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,563 INFO L628 ElimStorePlain]: treesize reduction 84, result has 63.3 percent of original size [2021-07-09 17:26:38,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:38,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:145 [2021-07-09 17:26:38,843 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_171, v_prenex_173, array_4], 1=[v_prenex_170, array_0, v_prenex_172]} [2021-07-09 17:26:38,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:26:38,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:38,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,926 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-07-09 17:26:38,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:38,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:38,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:38,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:38,967 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:39,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:39,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:39,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:39,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:39,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:39,090 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:39,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:26:39,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:39,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:39,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:26:39,121 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-07-09 17:26:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728198202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:39,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:39,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127016533] [2021-07-09 17:26:39,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:39,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:39,163 INFO L87 Difference]: Start difference. First operand 169 states and 501 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,439 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-09 17:26:39,618 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-07-09 17:26:39,841 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-07-09 17:26:40,046 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-07-09 17:26:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:40,086 INFO L93 Difference]: Finished difference Result 292 states and 821 transitions. [2021-07-09 17:26:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:40,087 INFO L225 Difference]: With dead ends: 292 [2021-07-09 17:26:40,087 INFO L226 Difference]: Without dead ends: 288 [2021-07-09 17:26:40,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1138.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-09 17:26:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 173. [2021-07-09 17:26:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.005813953488372) internal successors, (517), 172 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 517 transitions. [2021-07-09 17:26:40,090 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 517 transitions. Word has length 17 [2021-07-09 17:26:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:40,091 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 517 transitions. [2021-07-09 17:26:40,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 517 transitions. [2021-07-09 17:26:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:40,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:40,091 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:40,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-07-09 17:26:40,306 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1070448410, now seen corresponding path program 16 times [2021-07-09 17:26:40,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:40,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915362866] [2021-07-09 17:26:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915362866] [2021-07-09 17:26:40,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915362866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451774500] [2021-07-09 17:26:40,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:40,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:40,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:40,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:40,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:40,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:40,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:40,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:40,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:40,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:40,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:40,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:191, output treesize:247 [2021-07-09 17:26:41,406 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_191, v_prenex_182, v_prenex_184, array_4, v_prenex_187, v_prenex_189], 1=[v_prenex_190, v_prenex_181, array_0, v_prenex_183, v_prenex_186, v_prenex_188]} [2021-07-09 17:26:41,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:41,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:41,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,513 INFO L628 ElimStorePlain]: treesize reduction 226, result has 36.7 percent of original size [2021-07-09 17:26:41,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:41,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_184 vanished before elimination [2021-07-09 17:26:41,543 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:26:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:41,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:41,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:41,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:41,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:41,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:41,665 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,698 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:26:41,698 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-07-09 17:26:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:41,702 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:41,705 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:41,747 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:41,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:41,751 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:41,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:41,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:26:41,792 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:369, output treesize:52 [2021-07-09 17:26:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:41,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451774500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:41,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:41,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768161057] [2021-07-09 17:26:41,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:41,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:41,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:41,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:41,838 INFO L87 Difference]: Start difference. First operand 173 states and 517 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,222 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-09 17:26:42,537 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-07-09 17:26:42,782 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 75 [2021-07-09 17:26:43,037 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-07-09 17:26:43,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:43,117 INFO L93 Difference]: Finished difference Result 276 states and 795 transitions. [2021-07-09 17:26:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:43,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:43,119 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:26:43,119 INFO L226 Difference]: Without dead ends: 272 [2021-07-09 17:26:43,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1699.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-09 17:26:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2021-07-09 17:26:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.982142857142857) internal successors, (501), 168 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-07-09 17:26:43,122 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-07-09 17:26:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:43,122 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-07-09 17:26:43,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-07-09 17:26:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:43,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:43,122 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:43,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-09 17:26:43,333 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:43,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1402703998, now seen corresponding path program 17 times [2021-07-09 17:26:43,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:43,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629043047] [2021-07-09 17:26:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:43,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629043047] [2021-07-09 17:26:43,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629043047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148679701] [2021-07-09 17:26:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:43,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:26:43,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:43,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:43,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:43,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:43,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:43,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:43,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:43,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:43,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:43,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:43,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:43,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:175, output treesize:165 [2021-07-09 17:26:44,233 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_206, v_prenex_208, array_4, v_prenex_210, v_prenex_212, v_prenex_204], 1=[v_prenex_207, v_prenex_209, array_2, v_prenex_211, v_prenex_203, v_prenex_205]} [2021-07-09 17:26:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:44,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:44,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,406 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2021-07-09 17:26:44,407 INFO L628 ElimStorePlain]: treesize reduction 139, result has 63.0 percent of original size [2021-07-09 17:26:44,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:44,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:44,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:44,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:44,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:26:44,624 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:26:44,684 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:44,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-07-09 17:26:44,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-07-09 17:26:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:44,742 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:44,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:44,801 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:44,854 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:44,861 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:44,913 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:44,917 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:44,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:44,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:26:44,973 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:374, output treesize:66 [2021-07-09 17:26:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148679701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:45,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544443246] [2021-07-09 17:26:45,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:45,021 INFO L87 Difference]: Start difference. First operand 169 states and 501 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,457 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2021-07-09 17:26:45,826 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 102 [2021-07-09 17:26:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:45,902 INFO L93 Difference]: Finished difference Result 208 states and 594 transitions. [2021-07-09 17:26:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:45,903 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:26:45,903 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:26:45,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1183.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:26:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 168. [2021-07-09 17:26:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9760479041916166) internal successors, (497), 167 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 497 transitions. [2021-07-09 17:26:45,906 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 497 transitions. Word has length 17 [2021-07-09 17:26:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:45,906 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 497 transitions. [2021-07-09 17:26:45,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 497 transitions. [2021-07-09 17:26:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:45,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:45,906 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:46,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:46,123 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:46,123 INFO L82 PathProgramCache]: Analyzing trace with hash 736700478, now seen corresponding path program 18 times [2021-07-09 17:26:46,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:46,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239879703] [2021-07-09 17:26:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:46,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239879703] [2021-07-09 17:26:46,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239879703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:46,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605932251] [2021-07-09 17:26:46,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:46,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:46,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:46,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:46,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:46,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:46,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:46,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:46,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:46,604 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:191, output treesize:181 [2021-07-09 17:26:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:46,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:46,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:46,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:46,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,082 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-07-09 17:26:47,082 INFO L628 ElimStorePlain]: treesize reduction 104, result has 78.0 percent of original size [2021-07-09 17:26:47,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-07-09 17:26:47,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:47,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:47,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:26:47,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:47,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:47,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,221 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 17:26:47,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:47,228 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:47,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:47,250 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:47,256 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:47,262 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:26:47,267 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,390 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 17:26:47,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:47,395 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:47,505 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 17:26:47,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:47,511 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:47,515 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,630 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-09 17:26:47,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:47,636 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:47,641 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:47,747 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 17:26:47,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:26:47,753 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:47,758 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:47,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:47,763 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:47,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,881 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 17:26:47,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:47,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:47,887 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:486, output treesize:219 [2021-07-09 17:26:48,046 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-09 17:26:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:48,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605932251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:48,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:48,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:26:48,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251681763] [2021-07-09 17:26:48,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:48,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:48,121 INFO L87 Difference]: Start difference. First operand 168 states and 497 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,660 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-07-09 17:26:48,841 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-09 17:26:49,029 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-09 17:26:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:49,085 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-07-09 17:26:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:49,086 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:26:49,086 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:26:49,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1293.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:26:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 163. [2021-07-09 17:26:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9444444444444446) internal successors, (477), 162 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 477 transitions. [2021-07-09 17:26:49,089 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 477 transitions. Word has length 17 [2021-07-09 17:26:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:49,089 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 477 transitions. [2021-07-09 17:26:49,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 477 transitions. [2021-07-09 17:26:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:49,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:49,090 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:49,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-07-09 17:26:49,292 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1308901226, now seen corresponding path program 19 times [2021-07-09 17:26:49,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:49,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862412479] [2021-07-09 17:26:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:49,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:49,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862412479] [2021-07-09 17:26:49,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862412479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:49,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471817826] [2021-07-09 17:26:49,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:49,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:49,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:49,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:49,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:49,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:49,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:49,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:49,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:49,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:49,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:26:49,673 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:115, output treesize:103 [2021-07-09 17:26:50,023 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-07-09 17:26:50,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:26:50,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:50,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:50,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:50,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:50,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:26:50,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:50,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:50,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:50,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:50,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:50,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:50,082 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:50,317 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-07-09 17:26:50,318 INFO L628 ElimStorePlain]: treesize reduction 144, result has 71.3 percent of original size [2021-07-09 17:26:50,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:26:50,323 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:50,329 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:26:50,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:50,349 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:50,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:50,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:50,366 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:50,372 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:50,377 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:50,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:50,394 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:50,400 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:50,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:50,406 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:50,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:50,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:50,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:50,518 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 7 variables, input treesize:403, output treesize:179 [2021-07-09 17:26:50,662 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:26:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471817826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:50,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:50,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:50,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744353064] [2021-07-09 17:26:50,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:50,721 INFO L87 Difference]: Start difference. First operand 163 states and 477 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,234 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-07-09 17:26:51,531 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-07-09 17:26:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:51,597 INFO L93 Difference]: Finished difference Result 235 states and 676 transitions. [2021-07-09 17:26:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:51,599 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:26:51,599 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:26:51,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1138.2ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:26:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-07-09 17:26:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-07-09 17:26:51,601 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-07-09 17:26:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:51,601 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-07-09 17:26:51,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-07-09 17:26:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:51,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:51,602 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:51,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:51,803 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2024967756, now seen corresponding path program 20 times [2021-07-09 17:26:51,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:51,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313419046] [2021-07-09 17:26:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:52,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313419046] [2021-07-09 17:26:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313419046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:52,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321808766] [2021-07-09 17:26:52,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:52,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:52,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:52,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:52,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:52,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:52,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:52,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:52,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:52,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:52,236 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:221 [2021-07-09 17:26:52,640 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_240, array_4, v_prenex_243, v_prenex_236, v_prenex_238], 1=[v_prenex_239, array_0, v_prenex_242, v_prenex_235, v_prenex_237]} [2021-07-09 17:26:52,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:52,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:52,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,756 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-07-09 17:26:52,757 INFO L628 ElimStorePlain]: treesize reduction 128, result has 57.8 percent of original size [2021-07-09 17:26:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:52,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:52,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:52,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:52,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:52,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:52,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:52,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:52,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:52,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:52,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:53,030 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:53,034 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:53,087 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:53,091 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:53,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:53,143 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:53,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:53,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-07-09 17:26:53,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:53,187 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 15 variables, input treesize:315, output treesize:62 [2021-07-09 17:26:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:53,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321808766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:53,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:53,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:26:53,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072271355] [2021-07-09 17:26:53,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:26:53,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:26:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:53,234 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,664 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-07-09 17:26:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:53,731 INFO L93 Difference]: Finished difference Result 198 states and 571 transitions. [2021-07-09 17:26:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:53,732 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:26:53,732 INFO L226 Difference]: Without dead ends: 194 [2021-07-09 17:26:53,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-09 17:26:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 171. [2021-07-09 17:26:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.958823529411765) internal successors, (503), 170 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 503 transitions. [2021-07-09 17:26:53,735 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 503 transitions. Word has length 17 [2021-07-09 17:26:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:53,735 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 503 transitions. [2021-07-09 17:26:53,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 503 transitions. [2021-07-09 17:26:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:53,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:53,736 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:53,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-07-09 17:26:53,940 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2023379368, now seen corresponding path program 21 times [2021-07-09 17:26:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:53,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415358289] [2021-07-09 17:26:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:54,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415358289] [2021-07-09 17:26:54,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415358289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121916571] [2021-07-09 17:26:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:54,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:26:54,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:54,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:54,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:54,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:54,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:54,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:54,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:54,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:215 [2021-07-09 17:26:54,402 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_245, v_prenex_247, v_prenex_249], 1=[array_0, v_prenex_244, v_prenex_246, v_prenex_248]} [2021-07-09 17:26:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:26:54,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:54,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:54,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:54,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:54,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:54,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-07-09 17:26:54,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:26:54,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,610 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-07-09 17:26:54,610 INFO L628 ElimStorePlain]: treesize reduction 218, result has 53.9 percent of original size [2021-07-09 17:26:54,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:26:54,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:54,688 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:54,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:54,765 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:54,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:54,850 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:54,855 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:54,860 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:26:54,864 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:54,868 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-07-09 17:26:54,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:54,946 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:54,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:54,949 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:55,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:55,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:55,037 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:55,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:55,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:55,041 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:55,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:55,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:55,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:55,120 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:555, output treesize:159 [2021-07-09 17:26:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:55,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121916571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:55,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:55,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592997911] [2021-07-09 17:26:55,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:55,270 INFO L87 Difference]: Start difference. First operand 171 states and 503 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,707 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 17:26:55,913 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-07-09 17:26:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:55,960 INFO L93 Difference]: Finished difference Result 209 states and 604 transitions. [2021-07-09 17:26:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:55,961 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:26:55,961 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:26:55,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:26:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2021-07-09 17:26:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.9464285714285716) internal successors, (495), 168 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 495 transitions. [2021-07-09 17:26:55,964 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 495 transitions. Word has length 17 [2021-07-09 17:26:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:55,964 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 495 transitions. [2021-07-09 17:26:55,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 495 transitions. [2021-07-09 17:26:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:55,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:55,964 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:56,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-07-09 17:26:56,180 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2098340236, now seen corresponding path program 22 times [2021-07-09 17:26:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:56,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880066321] [2021-07-09 17:26:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:56,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880066321] [2021-07-09 17:26:56,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880066321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087841160] [2021-07-09 17:26:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:56,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:56,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:26:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:56,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:56,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:56,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:56,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:56,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:56,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:26:56,593 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-07-09 17:26:56,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:26:56,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:56,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:56,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:56,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:56,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:56,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:56,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:56,710 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:26:56,715 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:56,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:26:56,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:56,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:56,730 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,905 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-07-09 17:26:56,905 INFO L628 ElimStorePlain]: treesize reduction 375, result has 39.3 percent of original size [2021-07-09 17:26:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:56,910 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:56,915 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:56,919 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:56,933 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:56,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:26:56,950 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:56,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:56,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:56,954 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:57,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:57,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:26:57,029 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-07-09 17:26:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087841160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:57,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612680090] [2021-07-09 17:26:57,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:57,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:57,204 INFO L87 Difference]: Start difference. First operand 169 states and 495 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,577 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-07-09 17:26:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:57,639 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-07-09 17:26:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:57,640 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:26:57,640 INFO L226 Difference]: Without dead ends: 195 [2021-07-09 17:26:57,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-09 17:26:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2021-07-09 17:26:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.947674418604651) internal successors, (507), 172 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2021-07-09 17:26:57,643 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 17 [2021-07-09 17:26:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:57,643 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2021-07-09 17:26:57,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2021-07-09 17:26:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:57,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:57,643 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:57,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:57,849 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1062058060, now seen corresponding path program 23 times [2021-07-09 17:26:57,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:57,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485600701] [2021-07-09 17:26:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:58,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485600701] [2021-07-09 17:26:58,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485600701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662054945] [2021-07-09 17:26:58,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:58,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:58,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:58,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:26:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:58,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:58,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:58,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:58,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:26:58,599 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:262, output treesize:236 [2021-07-09 17:26:58,915 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-07-09 17:26:58,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:58,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:58,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:58,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:26:58,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:26:58,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:26:58,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:26:58,965 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:26:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:26:58,972 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:26:58,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:26:58,985 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:26:58,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,291 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2021-07-09 17:26:59,292 INFO L628 ElimStorePlain]: treesize reduction 337, result has 55.5 percent of original size [2021-07-09 17:26:59,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:26:59,298 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:26:59,303 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:59,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:59,317 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:59,322 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:59,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:26:59,335 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:26:59,340 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:59,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:26:59,357 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:59,362 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:26:59,367 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:59,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:26:59,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:26:59,379 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:59,488 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 17:26:59,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:59,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:26:59,493 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 7 variables, input treesize:603, output treesize:241 [2021-07-09 17:26:59,673 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-09 17:26:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:59,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662054945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:59,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:59,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:59,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766625070] [2021-07-09 17:26:59,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:59,759 INFO L87 Difference]: Start difference. First operand 173 states and 507 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,069 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-09 17:27:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:00,329 INFO L93 Difference]: Finished difference Result 219 states and 627 transitions. [2021-07-09 17:27:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:00,331 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:27:00,331 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:27:00,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 986.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:27:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2021-07-09 17:27:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9508196721311477) internal successors, (540), 183 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-07-09 17:27:00,334 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-07-09 17:27:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:00,334 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-07-09 17:27:00,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-07-09 17:27:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:00,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:00,334 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:00,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable929 [2021-07-09 17:27:00,541 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:00,541 INFO L82 PathProgramCache]: Analyzing trace with hash 419179810, now seen corresponding path program 24 times [2021-07-09 17:27:00,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:00,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104273060] [2021-07-09 17:27:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104273060] [2021-07-09 17:27:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104273060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033718956] [2021-07-09 17:27:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:00,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:00,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:01,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:01,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:01,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:01,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:01,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:01,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:01,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:01,196 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:01,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:01,201 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:01,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:27:01,266 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:223, output treesize:199 [2021-07-09 17:27:01,772 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_290, v_prenex_270, v_prenex_281, v_prenex_272, v_prenex_284, v_prenex_274, array_4, v_prenex_287, v_prenex_276, v_prenex_279], 1=[v_prenex_280, v_prenex_271, v_prenex_283, array_2, v_prenex_273, v_prenex_286, v_prenex_275, v_prenex_278, v_prenex_289, v_prenex_269]} [2021-07-09 17:27:01,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:01,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:01,942 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 103 [2021-07-09 17:27:01,943 INFO L628 ElimStorePlain]: treesize reduction 122, result has 69.3 percent of original size [2021-07-09 17:27:01,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-07-09 17:27:01,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-07-09 17:27:01,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:01,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:27:02,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:02,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:02,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:02,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:02,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,208 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:27:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:02,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:02,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:02,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:02,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:02,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,493 INFO L518 ElimStorePlain]: Eliminatee v_prenex_280 vanished before elimination [2021-07-09 17:27:02,493 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-07-09 17:27:02,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:02,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:02,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:02,520 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:27:02,525 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,618 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:27:02,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:02,624 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:02,628 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:27:02,720 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:02,804 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:02,809 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:02,908 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:02,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:02,912 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:02,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:02,992 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-07-09 17:27:02,992 INFO L518 ElimStorePlain]: Eliminatee v_prenex_269 vanished before elimination [2021-07-09 17:27:02,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-07-09 17:27:02,996 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 30 variables, input treesize:405, output treesize:126 [2021-07-09 17:27:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033718956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:03,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:27:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106999170] [2021-07-09 17:27:03,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:03,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:03,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:03,059 INFO L87 Difference]: Start difference. First operand 184 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,395 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 17:27:03,572 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-07-09 17:27:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:03,699 INFO L93 Difference]: Finished difference Result 234 states and 660 transitions. [2021-07-09 17:27:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:03,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:03,700 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:27:03,700 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:27:03,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 854.8ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:27:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2021-07-09 17:27:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.967741935483871) internal successors, (552), 186 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 552 transitions. [2021-07-09 17:27:03,704 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 552 transitions. Word has length 17 [2021-07-09 17:27:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:03,705 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 552 transitions. [2021-07-09 17:27:03,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 552 transitions. [2021-07-09 17:27:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:03,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:03,705 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:03,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:03,910 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash 516905718, now seen corresponding path program 25 times [2021-07-09 17:27:03,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:03,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501489049] [2021-07-09 17:27:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:04,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:04,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501489049] [2021-07-09 17:27:04,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501489049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:04,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702853493] [2021-07-09 17:27:04,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:04,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:04,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:04,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:04,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:04,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:04,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:04,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:04,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:04,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:04,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:04,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:04,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-07-09 17:27:04,726 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_305, v_prenex_307, v_prenex_309, array_4, v_prenex_301, v_prenex_303], 1=[v_prenex_306, v_prenex_308, array_2, v_prenex_300, v_prenex_302, v_prenex_304]} [2021-07-09 17:27:04,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:04,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:04,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:04,954 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2021-07-09 17:27:04,955 INFO L628 ElimStorePlain]: treesize reduction 152, result has 58.7 percent of original size [2021-07-09 17:27:04,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:04,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:05,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:05,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:05,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:05,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:05,143 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:27:05,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:05,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-07-09 17:27:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:05,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:05,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:05,327 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:05,331 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,388 INFO L518 ElimStorePlain]: Eliminatee v_prenex_300 vanished before elimination [2021-07-09 17:27:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:05,393 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:05,397 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:05,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:05,453 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:05,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:27:05,504 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-07-09 17:27:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:05,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702853493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:05,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:05,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790671520] [2021-07-09 17:27:05,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:05,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:05,551 INFO L87 Difference]: Start difference. First operand 187 states and 552 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:05,888 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-09 17:27:06,095 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2021-07-09 17:27:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:06,204 INFO L93 Difference]: Finished difference Result 230 states and 649 transitions. [2021-07-09 17:27:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:06,206 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:27:06,206 INFO L226 Difference]: Without dead ends: 222 [2021-07-09 17:27:06,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 958.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-09 17:27:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2021-07-09 17:27:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9508196721311477) internal successors, (540), 183 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-07-09 17:27:06,209 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-07-09 17:27:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:06,209 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-07-09 17:27:06,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-07-09 17:27:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:06,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:06,209 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:06,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-07-09 17:27:06,410 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:06,410 INFO L82 PathProgramCache]: Analyzing trace with hash 968096220, now seen corresponding path program 26 times [2021-07-09 17:27:06,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:06,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871675623] [2021-07-09 17:27:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:06,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871675623] [2021-07-09 17:27:06,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871675623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:06,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262470485] [2021-07-09 17:27:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:06,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:06,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:06,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:06,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:06,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:06,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:06,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:06,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:06,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:06,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:06,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:06,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:215 [2021-07-09 17:27:07,252 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_317, v_prenex_319, array_4, v_prenex_321, v_prenex_324], 1=[v_prenex_316, v_prenex_318, array_0, v_prenex_320, v_prenex_323]} [2021-07-09 17:27:07,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:07,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:07,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,372 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-07-09 17:27:07,372 INFO L628 ElimStorePlain]: treesize reduction 121, result has 59.4 percent of original size [2021-07-09 17:27:07,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:07,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:07,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:07,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:07,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:07,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:07,524 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:07,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:07,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_318 vanished before elimination [2021-07-09 17:27:07,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:07,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:07,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:07,680 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:07,684 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:07,731 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:07,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:07,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:07,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:07,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:07,783 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:315, output treesize:62 [2021-07-09 17:27:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262470485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:07,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:07,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:07,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547062462] [2021-07-09 17:27:07,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:07,832 INFO L87 Difference]: Start difference. First operand 184 states and 540 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,155 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-09 17:27:08,412 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2021-07-09 17:27:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:08,479 INFO L93 Difference]: Finished difference Result 208 states and 601 transitions. [2021-07-09 17:27:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:08,480 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:27:08,480 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:27:08,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1015.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:27:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-07-09 17:27:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.962566844919786) internal successors, (554), 187 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 554 transitions. [2021-07-09 17:27:08,483 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 554 transitions. Word has length 17 [2021-07-09 17:27:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:08,483 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 554 transitions. [2021-07-09 17:27:08,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 554 transitions. [2021-07-09 17:27:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:08,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:08,484 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:08,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:08,685 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -557813204, now seen corresponding path program 27 times [2021-07-09 17:27:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:08,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444727087] [2021-07-09 17:27:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:08,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:08,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444727087] [2021-07-09 17:27:08,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444727087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:08,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66235461] [2021-07-09 17:27:08,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:08,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:27:08,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:27:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:09,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:09,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:09,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:09,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:09,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:09,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:09,169 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:134, output treesize:122 [2021-07-09 17:27:09,347 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_330, v_prenex_332, v_prenex_334], 1=[v_prenex_329, array_0, v_prenex_331, v_prenex_333]} [2021-07-09 17:27:09,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:09,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,442 INFO L628 ElimStorePlain]: treesize reduction 150, result has 46.8 percent of original size [2021-07-09 17:27:09,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:09,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:09,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:09,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:09,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:09,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:09,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:09,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:09,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,621 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:27:09,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:09,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:09,628 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:09,673 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:09,676 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:27:09,711 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:289, output treesize:52 [2021-07-09 17:27:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66235461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:09,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:27:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273576076] [2021-07-09 17:27:09,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:09,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:09,763 INFO L87 Difference]: Start difference. First operand 188 states and 554 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:10,148 INFO L93 Difference]: Finished difference Result 219 states and 634 transitions. [2021-07-09 17:27:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:27:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:10,149 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:27:10,149 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:27:10,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:27:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2021-07-09 17:27:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-07-09 17:27:10,152 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-07-09 17:27:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:10,152 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-07-09 17:27:10,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-07-09 17:27:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:10,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:10,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:10,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,363 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 153290066, now seen corresponding path program 28 times [2021-07-09 17:27:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:10,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266923973] [2021-07-09 17:27:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:10,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:10,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266923973] [2021-07-09 17:27:10,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266923973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589161351] [2021-07-09 17:27:10,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:10,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:10,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:10,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:10,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:10,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:10,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:10,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:10,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:10,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:10,828 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-07-09 17:27:10,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:27:10,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:10,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:10,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:10,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:10,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:10,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:10,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:10,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:10,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:10,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:10,973 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:10,979 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:10,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:10,986 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,165 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-07-09 17:27:11,165 INFO L628 ElimStorePlain]: treesize reduction 378, result has 39.1 percent of original size [2021-07-09 17:27:11,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:11,170 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:11,174 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:11,177 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:11,181 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:11,185 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:11,196 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:11,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:11,199 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:11,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:11,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:27:11,271 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-07-09 17:27:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:11,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589161351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:11,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:11,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:11,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636149881] [2021-07-09 17:27:11,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:11,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:11,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:11,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:11,469 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,782 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-09 17:27:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:11,858 INFO L93 Difference]: Finished difference Result 209 states and 609 transitions. [2021-07-09 17:27:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:27:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:11,859 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:27:11,859 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:27:11,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:27:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 184. [2021-07-09 17:27:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9508196721311477) internal successors, (540), 183 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-07-09 17:27:11,862 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-07-09 17:27:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:11,862 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-07-09 17:27:11,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-07-09 17:27:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:11,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:11,862 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:12,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:12,065 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1175189202, now seen corresponding path program 29 times [2021-07-09 17:27:12,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:12,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207308961] [2021-07-09 17:27:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:12,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:12,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207308961] [2021-07-09 17:27:12,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207308961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:12,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115282696] [2021-07-09 17:27:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:12,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:12,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:27:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:12,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:12,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:12,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:12,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:12,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:12,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:12,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:12,496 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:293 [2021-07-09 17:27:13,095 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 96 [2021-07-09 17:27:13,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:13,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:13,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:13,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:13,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:13,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,523 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 161 [2021-07-09 17:27:14,524 INFO L628 ElimStorePlain]: treesize reduction 534, result has 50.6 percent of original size [2021-07-09 17:27:14,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:14,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:14,748 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-07-09 17:27:14,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:14,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:14,974 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-07-09 17:27:14,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:14,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:14,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,189 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-07-09 17:27:15,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:15,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:15,205 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,600 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 145 [2021-07-09 17:27:15,600 INFO L628 ElimStorePlain]: treesize reduction 11, result has 97.9 percent of original size [2021-07-09 17:27:15,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_351 vanished before elimination [2021-07-09 17:27:15,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:15,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,803 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 17:27:15,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:15,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:15,811 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:15,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:15,818 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,013 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 17:27:16,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:16,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-07-09 17:27:16,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:16,021 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:16,214 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-07-09 17:27:16,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:16,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:16,222 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:16,228 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:16,429 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-09 17:27:16,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:16,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:16,438 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:16,445 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,802 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2021-07-09 17:27:16,803 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.9 percent of original size [2021-07-09 17:27:16,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:16,810 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:16,816 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:16,987 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 17:27:16,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:16,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:16,994 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:17,173 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 17:27:17,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:17,182 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:17,188 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,375 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 17:27:17,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:27:17,381 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,549 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 17:27:17,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:17,561 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,715 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 17:27:17,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:17,722 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:17,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:17,727 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:17,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,884 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 17:27:17,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 18 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-09 17:27:17,898 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 28 variables, input treesize:1101, output treesize:264 [2021-07-09 17:27:18,078 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-07-09 17:27:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:18,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115282696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:18,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:27:18,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818811663] [2021-07-09 17:27:18,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:18,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:18,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:18,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:18,181 INFO L87 Difference]: Start difference. First operand 184 states and 540 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,633 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-07-09 17:27:19,223 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-07-09 17:27:19,581 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-07-09 17:27:19,763 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:27:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:19,867 INFO L93 Difference]: Finished difference Result 234 states and 668 transitions. [2021-07-09 17:27:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:19,868 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:27:19,868 INFO L226 Difference]: Without dead ends: 222 [2021-07-09 17:27:19,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2351.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-09 17:27:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2021-07-09 17:27:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9680851063829787) internal successors, (558), 188 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 558 transitions. [2021-07-09 17:27:19,871 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 558 transitions. Word has length 17 [2021-07-09 17:27:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:19,871 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 558 transitions. [2021-07-09 17:27:19,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 558 transitions. [2021-07-09 17:27:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:19,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:19,872 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:20,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,076 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1517772714, now seen corresponding path program 30 times [2021-07-09 17:27:20,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:20,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101226148] [2021-07-09 17:27:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101226148] [2021-07-09 17:27:20,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101226148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363190824] [2021-07-09 17:27:20,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:20,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:20,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:20,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:20,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:20,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:20,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:20,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:125 [2021-07-09 17:27:20,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:20,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:20,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:20,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:27:20,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:27:20,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:20,492 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:20,497 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:20,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:20,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:20,507 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:27:20,511 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,652 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-07-09 17:27:20,652 INFO L628 ElimStorePlain]: treesize reduction 245, result has 46.6 percent of original size [2021-07-09 17:27:20,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:20,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:20,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:20,671 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:20,675 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:20,679 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:20,689 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:20,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:20,699 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:20,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:20,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:27:20,760 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:427, output treesize:140 [2021-07-09 17:27:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363190824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:27:20,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038506216] [2021-07-09 17:27:20,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:20,887 INFO L87 Difference]: Start difference. First operand 189 states and 558 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,297 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:27:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:21,353 INFO L93 Difference]: Finished difference Result 212 states and 621 transitions. [2021-07-09 17:27:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:27:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,355 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:27:21,355 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:27:21,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:27:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-07-09 17:27:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9680851063829787) internal successors, (558), 188 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 558 transitions. [2021-07-09 17:27:21,357 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 558 transitions. Word has length 17 [2021-07-09 17:27:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:21,358 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 558 transitions. [2021-07-09 17:27:21,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 558 transitions. [2021-07-09 17:27:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:21,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:21,358 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:21,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-07-09 17:27:21,559 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1096748704, now seen corresponding path program 31 times [2021-07-09 17:27:21,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:21,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224212350] [2021-07-09 17:27:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:21,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:21,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224212350] [2021-07-09 17:27:21,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224212350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886794184] [2021-07-09 17:27:21,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:21,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:21,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:21,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:21,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:21,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:22,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:22,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:22,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:22,085 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-07-09 17:27:22,308 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:27:22,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:22,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:22,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:22,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:22,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:22,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:22,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:22,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:22,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:22,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:22,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:22,357 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:22,363 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:22,603 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-07-09 17:27:22,603 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-07-09 17:27:22,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:22,610 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:27:22,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:22,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:22,634 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:22,650 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:22,655 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:22,668 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:27:22,673 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:22,677 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:22,682 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:22,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:22,686 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:22,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:22,793 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-07-09 17:27:22,934 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:27:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:22,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886794184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:22,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:22,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677171428] [2021-07-09 17:27:22,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:22,992 INFO L87 Difference]: Start difference. First operand 189 states and 558 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:23,812 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 98 [2021-07-09 17:27:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:24,243 INFO L93 Difference]: Finished difference Result 252 states and 736 transitions. [2021-07-09 17:27:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:24,245 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:27:24,245 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:27:24,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1406.9ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:27:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:27:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 196. [2021-07-09 17:27:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.9692307692307693) internal successors, (579), 195 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 579 transitions. [2021-07-09 17:27:24,248 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 579 transitions. Word has length 17 [2021-07-09 17:27:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:24,248 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 579 transitions. [2021-07-09 17:27:24,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 579 transitions. [2021-07-09 17:27:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:24,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:24,248 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:24,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-07-09 17:27:24,457 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1716980722, now seen corresponding path program 32 times [2021-07-09 17:27:24,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:24,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942911722] [2021-07-09 17:27:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:24,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:24,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942911722] [2021-07-09 17:27:24,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942911722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:24,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908844385] [2021-07-09 17:27:24,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:24,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:24,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:24,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:24,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:24,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:24,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:24,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:24,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:24,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:24,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:24,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:183, output treesize:243 [2021-07-09 17:27:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:25,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:25,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,353 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-07-09 17:27:25,354 INFO L628 ElimStorePlain]: treesize reduction 233, result has 63.1 percent of original size [2021-07-09 17:27:25,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:25,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:25,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,477 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 17:27:25,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:25,483 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:25,592 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 17:27:25,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:25,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:25,602 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,719 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 17:27:25,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:27:25,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:25,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:25,736 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:27:25,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:25,747 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:25,752 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,919 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-07-09 17:27:25,920 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.9 percent of original size [2021-07-09 17:27:25,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:25,925 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:25,929 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:25,934 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:25,938 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:25,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:25,942 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:26,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:26,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:26,026 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:26,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:26,102 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-07-09 17:27:26,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:26,105 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-07-09 17:27:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:26,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908844385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:26,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:26,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271040116] [2021-07-09 17:27:26,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:26,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:26,273 INFO L87 Difference]: Start difference. First operand 196 states and 579 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:27,138 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-07-09 17:27:27,341 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 17:27:27,736 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 17:27:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:27,804 INFO L93 Difference]: Finished difference Result 272 states and 764 transitions. [2021-07-09 17:27:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:27,805 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:27:27,805 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:27:27,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1457.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:27:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:27:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2021-07-09 17:27:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.984848484848485) internal successors, (591), 198 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-07-09 17:27:27,808 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-07-09 17:27:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:27,808 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-07-09 17:27:27,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-07-09 17:27:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:27,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:27,809 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:28,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-07-09 17:27:28,009 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2006531768, now seen corresponding path program 33 times [2021-07-09 17:27:28,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:28,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105477794] [2021-07-09 17:27:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:28,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:28,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105477794] [2021-07-09 17:27:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105477794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:28,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652466406] [2021-07-09 17:27:28,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:28,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:28,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:28,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:28,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:28,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:28,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:28,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:28,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:28,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:158, output treesize:148 [2021-07-09 17:27:28,721 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 55=[array_2]} [2021-07-09 17:27:28,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:28,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:28,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:28,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:28,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:28,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:28,755 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:28,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:28,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:27:28,768 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:28,775 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:28,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:28,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:28,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:28,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:29,052 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2021-07-09 17:27:29,052 INFO L628 ElimStorePlain]: treesize reduction 278, result has 58.8 percent of original size [2021-07-09 17:27:29,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:29,086 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:29,091 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:29,105 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:29,110 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:29,123 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:29,128 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:27:29,133 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:29,139 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:29,156 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:29,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:29,160 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:29,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,269 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 17:27:29,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:29,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:27:29,274 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:509, output treesize:199 [2021-07-09 17:27:29,421 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-07-09 17:27:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:29,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652466406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:29,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:29,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049482016] [2021-07-09 17:27:29,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:29,506 INFO L87 Difference]: Start difference. First operand 199 states and 591 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,211 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-07-09 17:27:30,424 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2021-07-09 17:27:30,676 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-07-09 17:27:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:30,782 INFO L93 Difference]: Finished difference Result 340 states and 970 transitions. [2021-07-09 17:27:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:30,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:30,784 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:27:30,784 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:27:30,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1352.4ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:27:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 197. [2021-07-09 17:27:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.989795918367347) internal successors, (586), 196 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 586 transitions. [2021-07-09 17:27:30,788 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 586 transitions. Word has length 17 [2021-07-09 17:27:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:30,788 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 586 transitions. [2021-07-09 17:27:30,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 586 transitions. [2021-07-09 17:27:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:30,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:30,788 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:31,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-07-09 17:27:31,001 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:31,001 INFO L82 PathProgramCache]: Analyzing trace with hash -150320166, now seen corresponding path program 34 times [2021-07-09 17:27:31,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:31,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930445492] [2021-07-09 17:27:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:31,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930445492] [2021-07-09 17:27:31,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930445492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395318276] [2021-07-09 17:27:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:31,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:31,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:31,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:31,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:31,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:31,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:31,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:31,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:31,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:31,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 6 xjuncts. [2021-07-09 17:27:31,581 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:249, output treesize:225 [2021-07-09 17:27:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:31,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:32,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:32,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,224 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-07-09 17:27:32,225 INFO L628 ElimStorePlain]: treesize reduction 170, result has 62.8 percent of original size [2021-07-09 17:27:32,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-07-09 17:27:32,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:32,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:32,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:27:32,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:32,329 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:32,335 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:32,409 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:32,484 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:32,490 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:32,496 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:32,501 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:32,571 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:32,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:32,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:32,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:32,654 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:32,731 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:32,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:32,795 INFO L518 ElimStorePlain]: Eliminatee v_prenex_413 vanished before elimination [2021-07-09 17:27:32,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:27:32,798 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:471, output treesize:62 [2021-07-09 17:27:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395318276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:32,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:27:32,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066799724] [2021-07-09 17:27:32,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:32,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:32,841 INFO L87 Difference]: Start difference. First operand 197 states and 586 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:33,332 INFO L93 Difference]: Finished difference Result 239 states and 690 transitions. [2021-07-09 17:27:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:33,333 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:27:33,333 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:27:33,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 791.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:27:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2021-07-09 17:27:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9948453608247423) internal successors, (581), 194 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 581 transitions. [2021-07-09 17:27:33,336 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 581 transitions. Word has length 17 [2021-07-09 17:27:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:33,336 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 581 transitions. [2021-07-09 17:27:33,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 581 transitions. [2021-07-09 17:27:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:33,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:33,337 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:33,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-07-09 17:27:33,549 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1618381758, now seen corresponding path program 35 times [2021-07-09 17:27:33,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:33,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825791014] [2021-07-09 17:27:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:33,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:33,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825791014] [2021-07-09 17:27:33,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825791014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830366223] [2021-07-09 17:27:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:33,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:33,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:33,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:33,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:33,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:33,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:33,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:33,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:34,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:34,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:34,019 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:195, output treesize:185 [2021-07-09 17:27:34,350 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-09 17:27:35,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:35,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:35,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:35,358 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2021-07-09 17:27:35,359 INFO L628 ElimStorePlain]: treesize reduction 169, result has 63.9 percent of original size [2021-07-09 17:27:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:35,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:35,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,563 INFO L518 ElimStorePlain]: Eliminatee v_prenex_439 vanished before elimination [2021-07-09 17:27:35,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:35,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:35,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:35,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:35,762 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:35,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:27:35,854 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:35,859 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:35,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:35,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:35,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:35,946 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:36,025 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_435 vanished before elimination [2021-07-09 17:27:36,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:36,104 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:36,109 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:36,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:36,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:27:36,192 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:466, output treesize:66 [2021-07-09 17:27:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:36,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830366223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:36,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:36,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:27:36,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777742899] [2021-07-09 17:27:36,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:36,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:36,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:36,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:36,241 INFO L87 Difference]: Start difference. First operand 195 states and 581 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,693 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 17:27:37,027 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 123 [2021-07-09 17:27:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:37,155 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2021-07-09 17:27:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:37,157 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:27:37,157 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:27:37,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1182.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:27:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 194. [2021-07-09 17:27:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.989637305699482) internal successors, (577), 193 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 577 transitions. [2021-07-09 17:27:37,160 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 577 transitions. Word has length 17 [2021-07-09 17:27:37,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:37,160 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 577 transitions. [2021-07-09 17:27:37,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 577 transitions. [2021-07-09 17:27:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:37,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:37,161 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:37,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:37,373 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 952378238, now seen corresponding path program 36 times [2021-07-09 17:27:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:37,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248144059] [2021-07-09 17:27:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:37,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:37,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248144059] [2021-07-09 17:27:37,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248144059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:37,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934696266] [2021-07-09 17:27:37,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:37,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:37,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:37,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:37,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:37,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:37,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:37,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:37,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:37,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:37,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:37,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:37,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:223, output treesize:213 [2021-07-09 17:27:38,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:38,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:38,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:38,444 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-07-09 17:27:38,445 INFO L628 ElimStorePlain]: treesize reduction 200, result has 67.0 percent of original size [2021-07-09 17:27:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:38,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,577 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 17:27:38,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:38,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:38,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:27:38,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:38,600 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,716 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 17:27:38,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:38,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:38,728 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:38,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:38,738 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,851 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 17:27:38,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_450 vanished before elimination [2021-07-09 17:27:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:38,858 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:38,863 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,967 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 17:27:38,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:27:38,973 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:38,978 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:39,084 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 17:27:39,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:39,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:39,090 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:39,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:39,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:39,094 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:39,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:39,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:39,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:39,202 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 12 variables, input treesize:536, output treesize:204 [2021-07-09 17:27:39,346 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:27:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:39,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934696266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:39,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:39,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:27:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55290347] [2021-07-09 17:27:39,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:39,413 INFO L87 Difference]: Start difference. First operand 194 states and 577 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,763 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-07-09 17:27:39,952 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-09 17:27:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:40,004 INFO L93 Difference]: Finished difference Result 249 states and 719 transitions. [2021-07-09 17:27:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:40,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:40,005 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:27:40,005 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:27:40,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 990.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:27:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2021-07-09 17:27:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9682539682539684) internal successors, (561), 189 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 561 transitions. [2021-07-09 17:27:40,009 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 561 transitions. Word has length 17 [2021-07-09 17:27:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:40,009 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 561 transitions. [2021-07-09 17:27:40,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 561 transitions. [2021-07-09 17:27:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:40,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:40,010 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:40,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:40,210 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1965452058, now seen corresponding path program 37 times [2021-07-09 17:27:40,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:40,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850401021] [2021-07-09 17:27:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:40,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850401021] [2021-07-09 17:27:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850401021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616192244] [2021-07-09 17:27:40,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:27:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:40,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:40,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:40,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:40,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:40,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:40,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:40,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:40,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:40,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:40,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-07-09 17:27:40,905 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 36=[array_0]} [2021-07-09 17:27:40,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:40,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:40,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:40,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:40,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:40,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:40,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:40,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:40,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:40,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:40,960 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:40,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:40,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,205 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 86 [2021-07-09 17:27:41,205 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-07-09 17:27:41,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:27:41,211 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:41,216 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:41,229 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:41,235 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:41,247 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:41,252 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:41,265 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:41,270 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:41,276 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:41,280 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:41,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:27:41,296 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:41,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:41,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:41,398 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:419, output treesize:179 [2021-07-09 17:27:41,538 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:27:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:41,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616192244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:41,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:41,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:41,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407535762] [2021-07-09 17:27:41,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:41,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:41,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:41,593 INFO L87 Difference]: Start difference. First operand 190 states and 561 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,125 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-07-09 17:27:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:42,171 INFO L93 Difference]: Finished difference Result 220 states and 644 transitions. [2021-07-09 17:27:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:27:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:42,172 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:27:42,172 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:27:42,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 852.8ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:27:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 194. [2021-07-09 17:27:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9689119170984455) internal successors, (573), 193 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 573 transitions. [2021-07-09 17:27:42,175 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 573 transitions. Word has length 17 [2021-07-09 17:27:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:42,175 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 573 transitions. [2021-07-09 17:27:42,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 573 transitions. [2021-07-09 17:27:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:42,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:42,175 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:42,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:42,376 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash -848277368, now seen corresponding path program 38 times [2021-07-09 17:27:42,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:42,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023604647] [2021-07-09 17:27:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:42,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:42,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023604647] [2021-07-09 17:27:42,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023604647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:42,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516885883] [2021-07-09 17:27:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:42,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:42,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:42,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:42,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:42,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:42,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:42,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:42,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:42,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:42,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:42,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:171, output treesize:231 [2021-07-09 17:27:43,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:43,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:43,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:43,354 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-07-09 17:27:43,354 INFO L628 ElimStorePlain]: treesize reduction 221, result has 63.7 percent of original size [2021-07-09 17:27:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:43,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,471 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 17:27:43,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:43,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:43,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,596 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 17:27:43,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,596 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:27:43,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:27:43,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:43,607 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:43,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:43,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:43,624 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:27:43,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,792 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-07-09 17:27:43,792 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.6 percent of original size [2021-07-09 17:27:43,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:43,797 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:43,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:43,806 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:43,810 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:43,817 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:43,896 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:43,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:43,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:43,978 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:43,981 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:44,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:44,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:44,068 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-07-09 17:27:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516885883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:44,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:44,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:27:44,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015851971] [2021-07-09 17:27:44,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:44,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:44,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:44,212 INFO L87 Difference]: Start difference. First operand 194 states and 573 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,548 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-07-09 17:27:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:44,692 INFO L93 Difference]: Finished difference Result 229 states and 658 transitions. [2021-07-09 17:27:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:44,693 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:27:44,693 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:27:44,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:27:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2021-07-09 17:27:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9846938775510203) internal successors, (585), 196 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 585 transitions. [2021-07-09 17:27:44,696 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 585 transitions. Word has length 17 [2021-07-09 17:27:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:44,696 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 585 transitions. [2021-07-09 17:27:44,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 585 transitions. [2021-07-09 17:27:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:44,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:44,696 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:44,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,897 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1775713912, now seen corresponding path program 39 times [2021-07-09 17:27:44,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:44,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531621924] [2021-07-09 17:27:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:45,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531621924] [2021-07-09 17:27:45,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531621924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:45,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010868204] [2021-07-09 17:27:45,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:45,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:27:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:27:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:45,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:45,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:45,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:45,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:45,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:45,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:45,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:45,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:45,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:45,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:27:45,519 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-07-09 17:27:45,756 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_482, array_4, v_prenex_484, v_prenex_486, v_prenex_488], 1=[v_prenex_481, array_2, v_prenex_483, v_prenex_485, v_prenex_487]} [2021-07-09 17:27:45,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:45,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:45,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:45,932 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2021-07-09 17:27:45,932 INFO L628 ElimStorePlain]: treesize reduction 137, result has 63.5 percent of original size [2021-07-09 17:27:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:45,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:45,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:46,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:46,066 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:27:46,130 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:46,134 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:46,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:46,142 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:46,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:46,201 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,256 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:27:46,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:46,260 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_485 vanished before elimination [2021-07-09 17:27:46,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:46,314 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:46,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:46,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:46,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:46,326 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:46,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:46,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:27:46,374 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-07-09 17:27:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:46,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010868204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:46,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:46,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:46,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101152719] [2021-07-09 17:27:46,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:46,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:46,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:46,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:46,423 INFO L87 Difference]: Start difference. First operand 197 states and 585 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:47,200 INFO L93 Difference]: Finished difference Result 229 states and 650 transitions. [2021-07-09 17:27:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:47,201 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:27:47,201 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:27:47,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:27:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 191. [2021-07-09 17:27:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.968421052631579) internal successors, (564), 190 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 564 transitions. [2021-07-09 17:27:47,204 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 564 transitions. Word has length 17 [2021-07-09 17:27:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:47,204 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 564 transitions. [2021-07-09 17:27:47,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 564 transitions. [2021-07-09 17:27:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:47,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:47,205 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:47,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1824 [2021-07-09 17:27:47,405 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -299360958, now seen corresponding path program 40 times [2021-07-09 17:27:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843386763] [2021-07-09 17:27:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:47,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843386763] [2021-07-09 17:27:47,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843386763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143031380] [2021-07-09 17:27:47,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:47,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:47,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:47,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:47,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:47,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:47,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:47,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:47,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:47,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:47,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:47,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:47,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:47,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:135 [2021-07-09 17:27:48,159 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:27:48,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:48,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:48,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:48,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:48,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:48,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:27:48,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:48,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:48,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:27:48,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:48,200 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:48,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:48,211 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:48,457 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-07-09 17:27:48,458 INFO L628 ElimStorePlain]: treesize reduction 144, result has 71.3 percent of original size [2021-07-09 17:27:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:48,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:48,474 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:48,480 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:48,498 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:27:48,503 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:48,518 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:48,523 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:48,537 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:48,542 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:48,555 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:48,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:27:48,560 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,663 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-09 17:27:48,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:48,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:48,668 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:403, output treesize:179 [2021-07-09 17:27:48,823 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:27:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:48,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143031380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:48,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:48,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:48,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318817960] [2021-07-09 17:27:48,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:48,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:48,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:48,885 INFO L87 Difference]: Start difference. First operand 191 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:49,249 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-07-09 17:27:49,410 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-07-09 17:27:49,611 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:27:49,889 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:27:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:49,945 INFO L93 Difference]: Finished difference Result 230 states and 666 transitions. [2021-07-09 17:27:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:49,946 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:27:49,946 INFO L226 Difference]: Without dead ends: 222 [2021-07-09 17:27:49,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1325.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-09 17:27:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 193. [2021-07-09 17:27:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.96875) internal successors, (570), 192 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-07-09 17:27:49,949 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-07-09 17:27:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:49,949 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-07-09 17:27:49,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-07-09 17:27:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:49,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:49,950 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:50,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1873,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:50,151 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:50,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1114167112, now seen corresponding path program 41 times [2021-07-09 17:27:50,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:50,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409968629] [2021-07-09 17:27:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:50,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409968629] [2021-07-09 17:27:50,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409968629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062307152] [2021-07-09 17:27:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:50,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:50,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:50,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:50,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:50,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:50,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:50,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:50,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:50,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:50,545 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:27:50,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:50,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:50,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:50,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:50,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:50,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:27:50,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:50,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:50,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:50,954 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-07-09 17:27:50,954 INFO L628 ElimStorePlain]: treesize reduction 234, result has 57.8 percent of original size [2021-07-09 17:27:50,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:50,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:50,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:50,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:50,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:50,983 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:50,988 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:50,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:50,999 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:51,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:51,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:51,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:51,102 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:51,107 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:51,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:51,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:51,193 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:51,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:51,197 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:51,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:51,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:27:51,276 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:424, output treesize:140 [2021-07-09 17:27:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:51,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062307152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:51,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:51,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:27:51,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393517345] [2021-07-09 17:27:51,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:51,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:51,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:51,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:51,419 INFO L87 Difference]: Start difference. First operand 193 states and 570 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,735 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 17:27:52,001 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 17:27:52,239 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 17:27:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:52,294 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-07-09 17:27:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:52,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:52,295 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:27:52,295 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:27:52,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1041.6ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:27:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2021-07-09 17:27:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.968421052631579) internal successors, (564), 190 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 564 transitions. [2021-07-09 17:27:52,298 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 564 transitions. Word has length 17 [2021-07-09 17:27:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:52,298 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 564 transitions. [2021-07-09 17:27:52,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 564 transitions. [2021-07-09 17:27:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:52,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:52,299 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:52,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1914,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:52,499 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -92267976, now seen corresponding path program 42 times [2021-07-09 17:27:52,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:52,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682901267] [2021-07-09 17:27:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:52,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:52,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682901267] [2021-07-09 17:27:52,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682901267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:52,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037565982] [2021-07-09 17:27:52,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:52,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:52,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:52,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:52,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:52,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:52,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:52,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:52,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:52,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:52,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:52,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:177, output treesize:167 [2021-07-09 17:27:53,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:53,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:53,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,740 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 106 [2021-07-09 17:27:53,741 INFO L628 ElimStorePlain]: treesize reduction 154, result has 62.4 percent of original size [2021-07-09 17:27:53,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-07-09 17:27:53,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:53,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:53,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:53,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:53,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:53,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:54,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:54,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:54,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:54,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:27:54,153 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:54,225 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:54,230 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,306 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-07-09 17:27:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:54,312 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:27:54,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:54,384 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:54,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:54,389 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:54,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:54,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:27:54,451 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:424, output treesize:62 [2021-07-09 17:27:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:54,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037565982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:54,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:54,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:27:54,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047873422] [2021-07-09 17:27:54,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:54,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:54,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:54,497 INFO L87 Difference]: Start difference. First operand 191 states and 564 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,873 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:27:55,338 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2021-07-09 17:27:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:55,504 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-07-09 17:27:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:55,505 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:27:55,505 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:27:55,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1226.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:27:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2021-07-09 17:27:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-07-09 17:27:55,508 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-07-09 17:27:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:55,508 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-07-09 17:27:55,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-07-09 17:27:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:55,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:55,509 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:55,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1941 [2021-07-09 17:27:55,709 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1323400916, now seen corresponding path program 43 times [2021-07-09 17:27:55,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:55,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455565906] [2021-07-09 17:27:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:55,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455565906] [2021-07-09 17:27:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455565906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100989478] [2021-07-09 17:27:55,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:56,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:56,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:56,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:56,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:56,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:56,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:27:56,228 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:171, output treesize:231 [2021-07-09 17:27:56,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:56,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:56,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,666 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-07-09 17:27:56,666 INFO L628 ElimStorePlain]: treesize reduction 221, result has 62.6 percent of original size [2021-07-09 17:27:56,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:56,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:56,780 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 17:27:56,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:56,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:56,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:56,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,905 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 17:27:56,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:56,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:57,018 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-09 17:27:57,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:57,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:27:57,024 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:27:57,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:57,147 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 17:27:57,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:27:57,152 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:57,158 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:57,163 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:57,172 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:27:57,177 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:27:57,181 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,352 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-07-09 17:27:57,352 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.4 percent of original size [2021-07-09 17:27:57,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:57,357 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:57,361 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:57,366 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:57,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:57,370 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:57,373 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:57,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:57,449 INFO L518 ElimStorePlain]: Eliminatee v_prenex_524 vanished before elimination [2021-07-09 17:27:57,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:27:57,453 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-07-09 17:27:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:57,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100989478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:57,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:57,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:27:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537658090] [2021-07-09 17:27:57,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:27:57,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:27:57,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:57,601 INFO L87 Difference]: Start difference. First operand 195 states and 578 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:57,947 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-07-09 17:27:58,145 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 17:27:58,400 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-07-09 17:27:58,686 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 17:27:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:58,749 INFO L93 Difference]: Finished difference Result 235 states and 673 transitions. [2021-07-09 17:27:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:58,750 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:27:58,750 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:27:58,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1359.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:27:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:27:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2021-07-09 17:27:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.96875) internal successors, (570), 192 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-07-09 17:27:58,753 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-07-09 17:27:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:58,753 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-07-09 17:27:58,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-07-09 17:27:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:58,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:58,754 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:58,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2008 [2021-07-09 17:27:58,954 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash 250315536, now seen corresponding path program 44 times [2021-07-09 17:27:58,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:58,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378250229] [2021-07-09 17:27:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:59,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:59,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378250229] [2021-07-09 17:27:59,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378250229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:59,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34103369] [2021-07-09 17:27:59,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:59,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:59,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:59,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:27:59,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:59,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:27:59,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:27:59,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:27:59,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-07-09 17:27:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:27:59,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:27:59,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:27:59,707 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-07-09 17:27:59,707 INFO L628 ElimStorePlain]: treesize reduction 151, result has 68.4 percent of original size [2021-07-09 17:27:59,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:27:59,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:27:59,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:27:59,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:27:59,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,841 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 17:27:59,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:59,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:27:59,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:27:59,857 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:27:59,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:27:59,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:27:59,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:27:59,995 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:59,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:27:59,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:00,000 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,118 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 17:28:00,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:00,124 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,222 INFO L518 ElimStorePlain]: Eliminatee v_prenex_532 vanished before elimination [2021-07-09 17:28:00,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:00,228 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:00,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:00,232 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:00,334 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:00,339 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:00,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:00,350 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:00,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:00,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:00,447 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:404, output treesize:176 [2021-07-09 17:28:00,582 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:28:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:00,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34103369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:00,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:00,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:28:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621146350] [2021-07-09 17:28:00,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:00,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:00,655 INFO L87 Difference]: Start difference. First operand 193 states and 570 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,953 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 17:28:01,093 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-07-09 17:28:01,277 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-09 17:28:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:01,310 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-07-09 17:28:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:01,311 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:28:01,311 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:28:01,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 850.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:28:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:28:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 192. [2021-07-09 17:28:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.973821989528796) internal successors, (568), 191 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 568 transitions. [2021-07-09 17:28:01,314 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 568 transitions. Word has length 17 [2021-07-09 17:28:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:01,314 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 568 transitions. [2021-07-09 17:28:01,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 568 transitions. [2021-07-09 17:28:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:01,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:01,315 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:01,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,515 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:01,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash -326980856, now seen corresponding path program 45 times [2021-07-09 17:28:01,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:01,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927085533] [2021-07-09 17:28:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:01,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:01,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927085533] [2021-07-09 17:28:01,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927085533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:01,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554670234] [2021-07-09 17:28:01,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:01,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:01,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:01,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:01,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:01,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:01,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:01,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:01,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:01,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:28:02,426 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_547, v_prenex_549, array_4, v_prenex_551, v_prenex_553, v_prenex_545], 1=[v_prenex_548, array_2, v_prenex_550, v_prenex_552, v_prenex_544, v_prenex_546]} [2021-07-09 17:28:02,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:02,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:02,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,581 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-07-09 17:28:02,582 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.8 percent of original size [2021-07-09 17:28:02,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:28:02,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:02,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:02,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:02,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:02,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:02,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:02,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:02,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:02,864 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,915 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:28:02,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:02,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:02,968 INFO L518 ElimStorePlain]: Eliminatee v_prenex_552 vanished before elimination [2021-07-09 17:28:02,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:02,973 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:02,976 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:02,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:03,036 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:03,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:03,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:03,039 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:03,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:03,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:28:03,091 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-07-09 17:28:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554670234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:03,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:03,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:28:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539287332] [2021-07-09 17:28:03,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:03,140 INFO L87 Difference]: Start difference. First operand 192 states and 568 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,488 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-07-09 17:28:03,728 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2021-07-09 17:28:03,890 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 17:28:04,441 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 126 [2021-07-09 17:28:04,718 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2021-07-09 17:28:04,881 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-09 17:28:05,140 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 103 [2021-07-09 17:28:05,416 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 109 [2021-07-09 17:28:05,673 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-07-09 17:28:05,868 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-09 17:28:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:05,948 INFO L93 Difference]: Finished difference Result 304 states and 869 transitions. [2021-07-09 17:28:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:28:05,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:05,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:05,949 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:28:05,949 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:28:05,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2991.1ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:28:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-07-09 17:28:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.99492385786802) internal successors, (590), 197 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 590 transitions. [2021-07-09 17:28:05,952 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 590 transitions. Word has length 17 [2021-07-09 17:28:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:05,953 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 590 transitions. [2021-07-09 17:28:05,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 590 transitions. [2021-07-09 17:28:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:05,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:05,953 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:06,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-07-09 17:28:06,154 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 211426140, now seen corresponding path program 46 times [2021-07-09 17:28:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:06,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762227392] [2021-07-09 17:28:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:06,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762227392] [2021-07-09 17:28:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762227392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071105822] [2021-07-09 17:28:06,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:06,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:06,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:06,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:06,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:06,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:06,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:06,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:06,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:06,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:06,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:06,555 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:177, output treesize:167 [2021-07-09 17:28:06,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:06,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:06,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:06,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:06,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,156 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 108 [2021-07-09 17:28:07,157 INFO L628 ElimStorePlain]: treesize reduction 101, result has 78.0 percent of original size [2021-07-09 17:28:07,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_559 vanished before elimination [2021-07-09 17:28:07,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:07,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:07,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:07,299 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-09 17:28:07,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:07,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:07,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,443 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 17:28:07,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:07,451 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:07,457 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:07,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,596 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 17:28:07,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:07,603 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:07,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:07,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,744 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-09 17:28:07,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:07,751 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:07,757 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:07,873 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 17:28:07,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:07,884 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:07,890 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:07,895 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:07,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,024 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 17:28:08,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:08,030 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:08,149 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 17:28:08,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:08,155 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:08,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:08,159 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:08,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,281 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 17:28:08,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:08,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:08,285 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 15 variables, input treesize:474, output treesize:222 [2021-07-09 17:28:08,446 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-07-09 17:28:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:08,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071105822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:08,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:08,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:28:08,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952408250] [2021-07-09 17:28:08,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:08,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:08,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:08,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:08,520 INFO L87 Difference]: Start difference. First operand 198 states and 590 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:08,974 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 86 [2021-07-09 17:28:09,252 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2021-07-09 17:28:09,519 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2021-07-09 17:28:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:09,600 INFO L93 Difference]: Finished difference Result 285 states and 823 transitions. [2021-07-09 17:28:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:09,601 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:28:09,601 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 17:28:09,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1277.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:28:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 17:28:09,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 194. [2021-07-09 17:28:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-07-09 17:28:09,604 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-07-09 17:28:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:09,604 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-07-09 17:28:09,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-07-09 17:28:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:09,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:09,605 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:09,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:09,805 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash 947967822, now seen corresponding path program 47 times [2021-07-09 17:28:09,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:09,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413281479] [2021-07-09 17:28:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:10,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:10,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413281479] [2021-07-09 17:28:10,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413281479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061570641] [2021-07-09 17:28:10,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:28:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:10,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:10,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:10,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:10,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:10,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:10,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:10,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:10,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:10,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:209, output treesize:269 [2021-07-09 17:28:10,661 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-07-09 17:28:11,023 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_590, v_prenex_580, array_4, v_prenex_593, v_prenex_583, v_prenex_585, v_prenex_596, v_prenex_587, v_prenex_599, v_prenex_622, v_prenex_578, v_prenex_612, v_prenex_602, v_prenex_615, v_prenex_604, v_prenex_607, v_prenex_619, v_prenex_609], 1=[array_2, v_prenex_581, v_prenex_592, v_prenex_584, v_prenex_595, v_prenex_586, v_prenex_598, v_prenex_621, v_prenex_577, v_prenex_589, v_prenex_611, v_prenex_601, v_prenex_579, v_prenex_614, v_prenex_603, v_prenex_606, v_prenex_618, v_prenex_608]} [2021-07-09 17:28:11,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:11,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:11,301 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 180 [2021-07-09 17:28:11,302 INFO L628 ElimStorePlain]: treesize reduction 328, result has 57.4 percent of original size [2021-07-09 17:28:11,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:11,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:11,426 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-07-09 17:28:11,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:11,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:11,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:11,543 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-07-09 17:28:11,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:11,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:11,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:11,791 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2021-07-09 17:28:11,792 INFO L628 ElimStorePlain]: treesize reduction 11, result has 97.6 percent of original size [2021-07-09 17:28:11,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:28:11,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:11,911 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 17:28:11,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:11,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:11,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:12,037 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-07-09 17:28:12,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,037 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-07-09 17:28:12,037 INFO L518 ElimStorePlain]: Eliminatee v_prenex_587 vanished before elimination [2021-07-09 17:28:12,038 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-07-09 17:28:12,038 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-07-09 17:28:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:12,045 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:12,170 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-07-09 17:28:12,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,171 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-07-09 17:28:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:12,179 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:12,312 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-07-09 17:28:12,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,312 INFO L518 ElimStorePlain]: Eliminatee v_prenex_615 vanished before elimination [2021-07-09 17:28:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:12,320 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,457 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-07-09 17:28:12,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:12,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,596 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 17:28:12,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:12,604 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,848 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 154 [2021-07-09 17:28:12,848 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.9 percent of original size [2021-07-09 17:28:12,849 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-07-09 17:28:12,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:12,857 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:12,974 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-07-09 17:28:12,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:12,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:12,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:12,981 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,097 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-07-09 17:28:13,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:13,106 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:13,115 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,245 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 17:28:13,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:13,253 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:13,259 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,378 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-07-09 17:28:13,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_595 vanished before elimination [2021-07-09 17:28:13,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-07-09 17:28:13,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_598 vanished before elimination [2021-07-09 17:28:13,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_621 vanished before elimination [2021-07-09 17:28:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:13,386 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:13,393 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,516 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 17:28:13,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:13,523 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:13,528 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,642 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 17:28:13,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_611 vanished before elimination [2021-07-09 17:28:13,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:13,649 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:13,654 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,755 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-07-09 17:28:13,755 INFO L518 ElimStorePlain]: Eliminatee v_prenex_614 vanished before elimination [2021-07-09 17:28:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:13,761 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-07-09 17:28:13,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:13,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:13,857 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:13,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:13,948 INFO L518 ElimStorePlain]: Eliminatee v_prenex_608 vanished before elimination [2021-07-09 17:28:13,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 36 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-07-09 17:28:13,954 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 54 variables, input treesize:736, output treesize:170 [2021-07-09 17:28:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:14,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061570641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:14,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:14,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:28:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82416156] [2021-07-09 17:28:14,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:14,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:14,049 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,572 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2021-07-09 17:28:14,972 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 152 [2021-07-09 17:28:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:15,077 INFO L93 Difference]: Finished difference Result 227 states and 667 transitions. [2021-07-09 17:28:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:15,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:15,078 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:28:15,078 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:28:15,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1383.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:28:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-07-09 17:28:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.9743589743589745) internal successors, (580), 195 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 580 transitions. [2021-07-09 17:28:15,081 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 580 transitions. Word has length 17 [2021-07-09 17:28:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:15,081 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 580 transitions. [2021-07-09 17:28:15,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 580 transitions. [2021-07-09 17:28:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:15,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:15,082 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:15,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:15,289 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1290551334, now seen corresponding path program 48 times [2021-07-09 17:28:15,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:15,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68487931] [2021-07-09 17:28:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:15,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:15,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68487931] [2021-07-09 17:28:15,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68487931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:15,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710327039] [2021-07-09 17:28:15,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:15,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:15,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:15,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:15,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:15,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:15,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:15,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:15,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:15,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:15,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:15,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:28:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:15,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:15,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:15,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:15,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,147 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2021-07-09 17:28:16,148 INFO L628 ElimStorePlain]: treesize reduction 98, result has 78.6 percent of original size [2021-07-09 17:28:16,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:16,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:16,262 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 17:28:16,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:16,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:16,273 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,395 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 17:28:16,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:16,401 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,508 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 17:28:16,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:16,514 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:16,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:16,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,627 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 17:28:16,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,627 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:28:16,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:16,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:16,639 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:16,652 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,756 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 17:28:16,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:16,762 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:16,766 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:16,771 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:16,776 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:16,789 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:28:16,793 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:16,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:16,903 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:424, output treesize:176 [2021-07-09 17:28:17,037 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 17:28:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:17,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710327039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:17,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:17,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:28:17,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624592692] [2021-07-09 17:28:17,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:17,106 INFO L87 Difference]: Start difference. First operand 196 states and 580 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,493 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-07-09 17:28:17,638 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-07-09 17:28:17,818 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-09 17:28:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:17,854 INFO L93 Difference]: Finished difference Result 233 states and 675 transitions. [2021-07-09 17:28:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:17,855 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:28:17,855 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:28:17,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 930.9ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:28:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-07-09 17:28:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-07-09 17:28:17,858 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-07-09 17:28:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:17,858 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-07-09 17:28:17,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-07-09 17:28:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:17,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:17,859 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:18,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-07-09 17:28:18,062 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2132806164, now seen corresponding path program 49 times [2021-07-09 17:28:18,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:18,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529030919] [2021-07-09 17:28:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:18,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:18,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529030919] [2021-07-09 17:28:18,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529030919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:18,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514303224] [2021-07-09 17:28:18,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:18,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:18,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:18,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:18,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:18,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:18,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:18,411 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:77 [2021-07-09 17:28:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:18,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:18,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:18,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:18,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:18,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:18,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:18,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:18,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:18,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:18,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:18,534 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:18,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:18,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,688 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-09 17:28:18,689 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-07-09 17:28:18,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:18,693 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:18,697 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:18,701 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:18,705 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:18,717 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:18,720 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:18,724 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:18,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:18,736 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:18,739 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:18,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:18,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:28:18,804 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:28:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:18,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514303224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:18,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:18,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:28:18,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550417052] [2021-07-09 17:28:18,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:18,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:18,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:18,928 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:19,691 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-07-09 17:28:20,058 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-07-09 17:28:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:20,100 INFO L93 Difference]: Finished difference Result 312 states and 879 transitions. [2021-07-09 17:28:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:28:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:20,101 INFO L225 Difference]: With dead ends: 312 [2021-07-09 17:28:20,101 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:28:20,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1255.9ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:28:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 199. [2021-07-09 17:28:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.974747474747475) internal successors, (589), 198 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-07-09 17:28:20,104 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-07-09 17:28:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:20,104 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-07-09 17:28:20,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-07-09 17:28:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:20,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:20,105 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:20,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2293 [2021-07-09 17:28:20,305 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash 213094778, now seen corresponding path program 50 times [2021-07-09 17:28:20,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:20,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155571592] [2021-07-09 17:28:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:20,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155571592] [2021-07-09 17:28:20,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155571592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104014684] [2021-07-09 17:28:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:20,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:20,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:20,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:20,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:20,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:20,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:20,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:20,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:20,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 12 dim-0 vars, and 6 xjuncts. [2021-07-09 17:28:21,067 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:258, output treesize:300 [2021-07-09 17:28:21,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:21,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:21,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:21,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,789 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2021-07-09 17:28:21,790 INFO L628 ElimStorePlain]: treesize reduction 234, result has 63.1 percent of original size [2021-07-09 17:28:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:21,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,907 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 17:28:21,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:21,907 INFO L518 ElimStorePlain]: Eliminatee v_prenex_648 vanished before elimination [2021-07-09 17:28:21,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:21,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:21,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:28:21,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:21,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:21,936 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:21,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:21,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,109 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-07-09 17:28:22,110 INFO L628 ElimStorePlain]: treesize reduction 22, result has 93.1 percent of original size [2021-07-09 17:28:22,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:22,115 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:22,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:22,215 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:22,221 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:22,227 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:22,232 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:22,237 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:22,325 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:22,329 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:22,420 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:22,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:22,424 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:22,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:22,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 17:28:22,513 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 16 variables, input treesize:631, output treesize:83 [2021-07-09 17:28:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:22,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104014684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:22,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:22,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:28:22,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483894615] [2021-07-09 17:28:22,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:22,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:22,565 INFO L87 Difference]: Start difference. First operand 199 states and 589 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,049 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-07-09 17:28:23,189 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-07-09 17:28:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:23,265 INFO L93 Difference]: Finished difference Result 232 states and 673 transitions. [2021-07-09 17:28:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:23,266 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:28:23,266 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:28:23,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 991.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:28:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2021-07-09 17:28:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.97) internal successors, (594), 200 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 594 transitions. [2021-07-09 17:28:23,269 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 594 transitions. Word has length 17 [2021-07-09 17:28:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:23,269 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 594 transitions. [2021-07-09 17:28:23,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 594 transitions. [2021-07-09 17:28:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:23,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:23,269 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:23,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2309,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:23,470 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1694332648, now seen corresponding path program 51 times [2021-07-09 17:28:23,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:23,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33672947] [2021-07-09 17:28:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:23,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:23,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33672947] [2021-07-09 17:28:23,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33672947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:23,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287724931] [2021-07-09 17:28:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:23,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:23,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:23,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:23,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-07-09 17:28:23,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:23,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:23,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:23,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:23,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,815 INFO L628 ElimStorePlain]: treesize reduction 20, result has 86.2 percent of original size [2021-07-09 17:28:23,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:23,816 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:167, output treesize:125 [2021-07-09 17:28:23,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:23,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:23,959 INFO L628 ElimStorePlain]: treesize reduction 46, result has 74.2 percent of original size [2021-07-09 17:28:23,959 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:28:23,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:23,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:23,999 INFO L628 ElimStorePlain]: treesize reduction 33, result has 71.6 percent of original size [2021-07-09 17:28:23,999 INFO L518 ElimStorePlain]: Eliminatee v_prenex_652 vanished before elimination [2021-07-09 17:28:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:28:24,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:24,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:24,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:24,026 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:28:24,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_654 vanished before elimination [2021-07-09 17:28:24,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:24,027 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-07-09 17:28:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:24,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287724931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:24,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:24,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:28:24,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597741008] [2021-07-09 17:28:24,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:24,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:24,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:24,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:24,059 INFO L87 Difference]: Start difference. First operand 201 states and 594 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,546 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2021-07-09 17:28:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:24,585 INFO L93 Difference]: Finished difference Result 231 states and 671 transitions. [2021-07-09 17:28:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:24,586 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:28:24,586 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:28:24,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:28:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:28:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-07-09 17:28:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.9846153846153847) internal successors, (582), 195 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-07-09 17:28:24,589 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 17 [2021-07-09 17:28:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:24,589 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-07-09 17:28:24,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-07-09 17:28:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:24,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:24,589 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:24,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2357 [2021-07-09 17:28:24,790 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash -812726634, now seen corresponding path program 52 times [2021-07-09 17:28:24,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:24,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199910020] [2021-07-09 17:28:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:25,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199910020] [2021-07-09 17:28:25,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199910020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598668426] [2021-07-09 17:28:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:25,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:25,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:25,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:25,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:25,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:25,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:25,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:25,174 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:28:25,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:25,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:25,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:25,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:25,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:25,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:25,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:25,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:25,281 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:25,285 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:25,289 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:25,293 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:25,297 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,442 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 17:28:25,442 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-07-09 17:28:25,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:25,446 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:25,450 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:25,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:25,457 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:25,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:25,471 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:25,474 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:25,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:25,487 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:25,490 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:25,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:28:25,555 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:28:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:25,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598668426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:25,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:25,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:28:25,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971778362] [2021-07-09 17:28:25,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:25,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:25,684 INFO L87 Difference]: Start difference. First operand 196 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:26,338 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-09 17:28:26,526 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 17:28:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:26,579 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2021-07-09 17:28:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:26,580 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:28:26,580 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:28:26,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:28:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 199. [2021-07-09 17:28:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.984848484848485) internal successors, (591), 198 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-07-09 17:28:26,583 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-07-09 17:28:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:26,583 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-07-09 17:28:26,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-07-09 17:28:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:26,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:26,584 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:26,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2380 [2021-07-09 17:28:26,797 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 668511236, now seen corresponding path program 53 times [2021-07-09 17:28:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:26,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774070580] [2021-07-09 17:28:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:27,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:27,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774070580] [2021-07-09 17:28:27,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774070580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:27,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744800325] [2021-07-09 17:28:27,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:27,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:27,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:27,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:27,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:27,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:27,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:27,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:27,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:27,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:211 [2021-07-09 17:28:27,424 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_657, v_prenex_659, array_2, v_prenex_655], 1=[v_prenex_658, array_4, v_prenex_660, v_prenex_656]} [2021-07-09 17:28:27,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:27,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:27,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:27,623 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-07-09 17:28:27,623 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.6 percent of original size [2021-07-09 17:28:27,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:27,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:27,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:27,638 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:27,642 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:27,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:28:27,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,785 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 17:28:27,786 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.2 percent of original size [2021-07-09 17:28:27,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:27,790 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:27,854 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:27,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:27,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:27,926 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,996 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:28:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:27,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:28,000 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:28,004 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:28,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:28,007 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:28,011 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:28,014 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:28,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:28,076 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:28,079 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:28,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:28,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:28,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:28,144 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:28:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:28,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744800325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:28,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:28,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:28:28,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997501066] [2021-07-09 17:28:28,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:28:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:28:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:28:28,283 INFO L87 Difference]: Start difference. First operand 199 states and 591 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,920 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-07-09 17:28:29,223 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-07-09 17:28:29,483 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-07-09 17:28:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:29,574 INFO L93 Difference]: Finished difference Result 255 states and 741 transitions. [2021-07-09 17:28:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:29,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:29,575 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:28:29,575 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:28:29,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1507.0ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:28:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 194. [2021-07-09 17:28:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-07-09 17:28:29,578 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-07-09 17:28:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:29,578 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-07-09 17:28:29,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-07-09 17:28:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:29,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:29,579 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:29,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2398 [2021-07-09 17:28:29,780 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 672434372, now seen corresponding path program 54 times [2021-07-09 17:28:29,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:29,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202226080] [2021-07-09 17:28:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:29,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:29,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202226080] [2021-07-09 17:28:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202226080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773278452] [2021-07-09 17:28:29,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:30,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:30,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:30,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:30,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:30,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:30,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:30,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:30,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:30,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:187, output treesize:243 [2021-07-09 17:28:30,622 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_668, array_0, v_prenex_670, v_prenex_672, v_prenex_674], 1=[v_prenex_669, array_4, v_prenex_671, v_prenex_673, v_prenex_675]} [2021-07-09 17:28:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:30,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:30,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,742 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-07-09 17:28:30,743 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.7 percent of original size [2021-07-09 17:28:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:30,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:30,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:30,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:30,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:30,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:30,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:30,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:30,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:30,901 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:30,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-07-09 17:28:30,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:30,952 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:30,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:30,956 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:30,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:31,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:31,015 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:31,066 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:31,069 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:31,121 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:31,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:31,164 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-07-09 17:28:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:31,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773278452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:31,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:31,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:28:31,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371376786] [2021-07-09 17:28:31,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:31,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:31,215 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,612 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-07-09 17:28:31,934 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 110 [2021-07-09 17:28:32,200 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-07-09 17:28:32,618 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2021-07-09 17:28:32,982 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 127 [2021-07-09 17:28:33,256 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-07-09 17:28:33,647 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 118 [2021-07-09 17:28:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:33,765 INFO L93 Difference]: Finished difference Result 272 states and 787 transitions. [2021-07-09 17:28:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:33,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:33,766 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:28:33,766 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:28:33,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2586.7ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:28:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 198. [2021-07-09 17:28:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9746192893401013) internal successors, (586), 197 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-07-09 17:28:33,769 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-07-09 17:28:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:33,769 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-07-09 17:28:33,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-07-09 17:28:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:33,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:33,770 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:33,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:33,970 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1633532686, now seen corresponding path program 55 times [2021-07-09 17:28:33,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:33,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333079949] [2021-07-09 17:28:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:34,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:34,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333079949] [2021-07-09 17:28:34,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333079949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838118331] [2021-07-09 17:28:34,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:34,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:34,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:34,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:34,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:34,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:34,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:34,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:191, output treesize:247 [2021-07-09 17:28:34,772 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_682, v_prenex_684, v_prenex_686], 1=[array_4, v_prenex_683, v_prenex_685, v_prenex_687]} [2021-07-09 17:28:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:34,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:34,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,853 INFO L628 ElimStorePlain]: treesize reduction 141, result has 43.6 percent of original size [2021-07-09 17:28:34,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:34,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:34,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:34,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:34,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,932 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:28:34,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:34,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:34,963 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:34,990 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:34,993 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:35,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:35,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:35,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:28:35,025 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:264, output treesize:38 [2021-07-09 17:28:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:35,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838118331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:35,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:35,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:28:35,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661811652] [2021-07-09 17:28:35,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:35,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:35,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:35,054 INFO L87 Difference]: Start difference. First operand 198 states and 586 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,580 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-07-09 17:28:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:35,650 INFO L93 Difference]: Finished difference Result 230 states and 670 transitions. [2021-07-09 17:28:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:28:35,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:35,651 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:28:35,651 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:28:35,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 831.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:28:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-07-09 17:28:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.985074626865672) internal successors, (600), 201 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 600 transitions. [2021-07-09 17:28:35,654 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 600 transitions. Word has length 17 [2021-07-09 17:28:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:35,654 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 600 transitions. [2021-07-09 17:28:35,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 600 transitions. [2021-07-09 17:28:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:35,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:35,655 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:35,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-07-09 17:28:35,865 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1386912514, now seen corresponding path program 56 times [2021-07-09 17:28:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968146049] [2021-07-09 17:28:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:36,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:36,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968146049] [2021-07-09 17:28:36,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968146049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:36,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156518131] [2021-07-09 17:28:36,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:36,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:36,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:36,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:36,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:36,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:36,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:36,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:36,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:235 [2021-07-09 17:28:36,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:36,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:36,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:36,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:36,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:36,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-07-09 17:28:36,505 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:36,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:28:36,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,715 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-07-09 17:28:36,716 INFO L628 ElimStorePlain]: treesize reduction 206, result has 58.2 percent of original size [2021-07-09 17:28:36,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:36,722 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:36,727 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:36,732 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:36,738 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:36,742 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:36,826 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:36,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:36,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:36,913 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:36,918 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:36,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:37,005 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:37,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:37,098 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:37,103 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:37,201 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:37,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:37,280 INFO L518 ElimStorePlain]: Eliminatee v_prenex_697 vanished before elimination [2021-07-09 17:28:37,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:37,283 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:613, output treesize:135 [2021-07-09 17:28:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:37,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156518131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:37,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:28:37,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011309402] [2021-07-09 17:28:37,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:37,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:37,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:37,420 INFO L87 Difference]: Start difference. First operand 202 states and 600 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,110 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-09 17:28:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:38,161 INFO L93 Difference]: Finished difference Result 241 states and 703 transitions. [2021-07-09 17:28:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:38,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:38,162 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:28:38,162 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:28:38,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 865.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:28:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2021-07-09 17:28:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9748743718592965) internal successors, (592), 199 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 592 transitions. [2021-07-09 17:28:38,165 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 592 transitions. Word has length 17 [2021-07-09 17:28:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:38,165 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 592 transitions. [2021-07-09 17:28:38,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 592 transitions. [2021-07-09 17:28:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:38,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:38,166 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:38,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:38,366 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1560160206, now seen corresponding path program 57 times [2021-07-09 17:28:38,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:38,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203695936] [2021-07-09 17:28:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:38,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:38,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203695936] [2021-07-09 17:28:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203695936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:38,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938744856] [2021-07-09 17:28:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:38,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:38,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:28:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:38,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:38,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:38,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:38,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:38,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:38,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:38,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:38,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:38,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:134, output treesize:124 [2021-07-09 17:28:39,003 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_703, array_0, v_prenex_705, v_prenex_707], 1=[v_prenex_704, array_2, v_prenex_706, v_prenex_708]} [2021-07-09 17:28:39,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:39,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,094 INFO L628 ElimStorePlain]: treesize reduction 152, result has 46.9 percent of original size [2021-07-09 17:28:39,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:39,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:39,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:39,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:39,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:39,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:39,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,206 INFO L518 ElimStorePlain]: Eliminatee v_prenex_704 vanished before elimination [2021-07-09 17:28:39,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:39,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:39,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:39,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:39,256 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:39,300 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:39,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:39,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:39,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:28:39,344 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:293, output treesize:52 [2021-07-09 17:28:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:39,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938744856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:39,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:39,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:28:39,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97678319] [2021-07-09 17:28:39,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:39,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:39,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:39,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:39,392 INFO L87 Difference]: Start difference. First operand 200 states and 592 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:39,742 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-07-09 17:28:40,027 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-07-09 17:28:40,207 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-07-09 17:28:40,449 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 100 [2021-07-09 17:28:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:40,559 INFO L93 Difference]: Finished difference Result 231 states and 678 transitions. [2021-07-09 17:28:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:40,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:40,560 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:28:40,560 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:28:40,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1157.7ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:28:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2021-07-09 17:28:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-07-09 17:28:40,562 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-07-09 17:28:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:40,563 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-07-09 17:28:40,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-07-09 17:28:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:40,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:40,563 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:40,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:40,764 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:40,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1698524914, now seen corresponding path program 58 times [2021-07-09 17:28:40,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:40,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865861160] [2021-07-09 17:28:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:40,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865861160] [2021-07-09 17:28:40,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865861160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:40,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855833421] [2021-07-09 17:28:40,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:40,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:41,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:41,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:41,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:41,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:41,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:41,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:41,084 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:28:41,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:41,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:41,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:41,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:41,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:41,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:41,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:41,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:41,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:41,186 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:41,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:41,194 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:41,198 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:41,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,354 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 17:28:41,354 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-07-09 17:28:41,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:41,359 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:41,362 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:41,366 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:41,370 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:41,380 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:41,384 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:41,388 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:41,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:41,403 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:41,406 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:41,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:41,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:28:41,472 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:28:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:41,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855833421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:41,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:41,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:28:41,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418134402] [2021-07-09 17:28:41,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:41,600 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,085 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:28:42,256 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:28:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:42,295 INFO L93 Difference]: Finished difference Result 225 states and 659 transitions. [2021-07-09 17:28:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:42,296 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:28:42,296 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:28:42,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 819.6ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:28:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:28:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-07-09 17:28:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9746192893401013) internal successors, (586), 197 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-07-09 17:28:42,299 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-07-09 17:28:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:42,299 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-07-09 17:28:42,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-07-09 17:28:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:42,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:42,300 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:42,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-07-09 17:28:42,516 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash -217287044, now seen corresponding path program 59 times [2021-07-09 17:28:42,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:42,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72173104] [2021-07-09 17:28:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:42,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72173104] [2021-07-09 17:28:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72173104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168992167] [2021-07-09 17:28:42,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:42,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:42,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:42,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:42,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:42,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:42,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:42,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:42,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:42,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:42,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:42,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:42,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:43,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:43,055 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:191, output treesize:251 [2021-07-09 17:28:43,279 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-07-09 17:28:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:43,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:43,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:43,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:43,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:43,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:43,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:43,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:43,321 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:43,327 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:43,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:28:43,334 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:43,340 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:43,347 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:43,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:28:43,361 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:43,367 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,603 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-07-09 17:28:43,604 INFO L628 ElimStorePlain]: treesize reduction 203, result has 61.9 percent of original size [2021-07-09 17:28:43,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:43,609 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:43,615 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:43,620 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:43,625 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:43,630 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:43,642 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:43,647 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:43,660 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:43,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:43,665 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:43,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:43,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:43,758 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:675, output treesize:151 [2021-07-09 17:28:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:43,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168992167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:43,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 17:28:43,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904411257] [2021-07-09 17:28:43,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:43,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:43,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:43,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:43,930 INFO L87 Difference]: Start difference. First operand 198 states and 586 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,323 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-07-09 17:28:44,512 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 17:28:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:44,711 INFO L93 Difference]: Finished difference Result 234 states and 673 transitions. [2021-07-09 17:28:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:44,712 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:28:44,713 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:28:44,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:28:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 201. [2021-07-09 17:28:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.99) internal successors, (598), 200 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 598 transitions. [2021-07-09 17:28:44,716 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 598 transitions. Word has length 17 [2021-07-09 17:28:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:44,716 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 598 transitions. [2021-07-09 17:28:44,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 598 transitions. [2021-07-09 17:28:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:44,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:44,717 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:44,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2571,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:44,921 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1888263060, now seen corresponding path program 60 times [2021-07-09 17:28:44,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:44,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864638595] [2021-07-09 17:28:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:45,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:45,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864638595] [2021-07-09 17:28:45,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864638595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849331761] [2021-07-09 17:28:45,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:45,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:28:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:45,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:45,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:45,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:45,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:45,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:45,341 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:45,344 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,406 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-07-09 17:28:45,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:45,408 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-07-09 17:28:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:45,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:45,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:45,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,531 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-07-09 17:28:45,531 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-07-09 17:28:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:28:45,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:45,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:45,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:45,557 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:28:45,558 INFO L518 ElimStorePlain]: Eliminatee v_prenex_717 vanished before elimination [2021-07-09 17:28:45,558 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:28:45,558 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:28:45,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:28:45,558 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-07-09 17:28:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:45,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849331761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:45,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:28:45,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861269792] [2021-07-09 17:28:45,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:45,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:45,589 INFO L87 Difference]: Start difference. First operand 201 states and 598 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:46,272 INFO L93 Difference]: Finished difference Result 234 states and 665 transitions. [2021-07-09 17:28:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:46,273 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:28:46,273 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:28:46,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:28:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 195. [2021-07-09 17:28:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-07-09 17:28:46,281 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 17 [2021-07-09 17:28:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:46,281 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-07-09 17:28:46,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-07-09 17:28:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:46,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:46,282 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:46,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2603,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,482 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash 331629366, now seen corresponding path program 61 times [2021-07-09 17:28:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:46,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940153954] [2021-07-09 17:28:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:46,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940153954] [2021-07-09 17:28:46,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940153954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:46,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066451276] [2021-07-09 17:28:46,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:46,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:46,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:46,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:46,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:46,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:46,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:46,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:46,921 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:28:47,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:47,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:47,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:47,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:47,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:47,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:28:47,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:47,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:47,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:28:47,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:47,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:47,041 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:47,046 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:47,049 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,216 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-09 17:28:47,216 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-07-09 17:28:47,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:47,221 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:47,224 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:47,228 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:47,231 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:47,242 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:47,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:47,248 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:47,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:47,262 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:47,265 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:47,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:47,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:28:47,330 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:28:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066451276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:47,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:47,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:28:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231933412] [2021-07-09 17:28:47,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:28:47,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:47,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:28:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:28:47,461 INFO L87 Difference]: Start difference. First operand 195 states and 577 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,940 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 17:28:48,129 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:28:48,426 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:28:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:48,487 INFO L93 Difference]: Finished difference Result 235 states and 681 transitions. [2021-07-09 17:28:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:48,488 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:28:48,488 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:28:48,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1149.3ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:28:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:28:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 197. [2021-07-09 17:28:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9744897959183674) internal successors, (583), 196 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-07-09 17:28:48,491 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-07-09 17:28:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:48,491 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-07-09 17:28:48,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-07-09 17:28:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:48,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:48,492 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:48,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2626 [2021-07-09 17:28:48,705 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash -483176788, now seen corresponding path program 62 times [2021-07-09 17:28:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:48,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421308554] [2021-07-09 17:28:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:48,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421308554] [2021-07-09 17:28:48,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421308554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:48,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179900043] [2021-07-09 17:28:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:48,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:49,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:49,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:49,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:49,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:49,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:49,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:49,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:167, output treesize:157 [2021-07-09 17:28:49,407 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-07-09 17:28:49,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:49,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:49,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:49,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:49,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:49,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:49,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:49,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:49,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:49,451 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:49,456 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:49,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:49,461 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:49,737 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-07-09 17:28:49,737 INFO L628 ElimStorePlain]: treesize reduction 152, result has 72.5 percent of original size [2021-07-09 17:28:49,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:49,743 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:49,748 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:49,754 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:49,758 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:49,771 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:49,776 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:49,793 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:49,798 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:49,811 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:49,816 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:49,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:49,820 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,935 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 17:28:49,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:49,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:49,939 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:457, output treesize:197 [2021-07-09 17:28:50,071 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-07-09 17:28:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179900043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:50,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:28:50,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713240088] [2021-07-09 17:28:50,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:28:50,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:28:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:28:50,133 INFO L87 Difference]: Start difference. First operand 197 states and 583 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:50,663 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:28:50,833 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-09 17:28:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:50,896 INFO L93 Difference]: Finished difference Result 221 states and 648 transitions. [2021-07-09 17:28:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:50,897 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:28:50,897 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:28:50,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1026.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:28:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-07-09 17:28:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-07-09 17:28:50,899 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 17 [2021-07-09 17:28:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:50,900 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-07-09 17:28:50,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-07-09 17:28:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:50,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:50,900 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:51,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2642 [2021-07-09 17:28:51,101 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 538722348, now seen corresponding path program 63 times [2021-07-09 17:28:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:51,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59523538] [2021-07-09 17:28:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:51,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59523538] [2021-07-09 17:28:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59523538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111833179] [2021-07-09 17:28:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:51,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:51,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:51,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:51,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:51,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:51,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:51,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:51,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:51,455 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:185, output treesize:175 [2021-07-09 17:28:51,885 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_734, array_4], 21=[array_2, v_prenex_733]} [2021-07-09 17:28:51,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:51,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:51,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:51,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:51,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:51,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:51,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:51,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,099 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2021-07-09 17:28:52,100 INFO L628 ElimStorePlain]: treesize reduction 117, result has 70.2 percent of original size [2021-07-09 17:28:52,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:52,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:52,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:52,113 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:52,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:52,120 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:52,126 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:52,232 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 17:28:52,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:52,239 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:52,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:52,260 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:52,266 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:52,285 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:52,291 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:52,306 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:52,312 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:52,423 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:52,429 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:52,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:52,435 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:52,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-07-09 17:28:52,530 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 18 variables, input treesize:435, output treesize:112 [2021-07-09 17:28:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:52,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111833179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:52,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:52,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:28:52,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234655377] [2021-07-09 17:28:52,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:52,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:52,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:52,584 INFO L87 Difference]: Start difference. First operand 195 states and 577 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:52,969 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-07-09 17:28:53,279 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 106 [2021-07-09 17:28:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:53,413 INFO L93 Difference]: Finished difference Result 219 states and 638 transitions. [2021-07-09 17:28:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:53,414 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:28:53,414 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:28:53,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1046.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:28:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2021-07-09 17:28:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.984848484848485) internal successors, (591), 198 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-07-09 17:28:53,417 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-07-09 17:28:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:53,417 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-07-09 17:28:53,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-07-09 17:28:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:53,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:53,417 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:53,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:53,625 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1954391240, now seen corresponding path program 64 times [2021-07-09 17:28:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:53,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392799282] [2021-07-09 17:28:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:53,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392799282] [2021-07-09 17:28:53,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392799282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245781247] [2021-07-09 17:28:53,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:53,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:53,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:53,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:53,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:54,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:54,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:54,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:54,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:54,098 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:187, output treesize:247 [2021-07-09 17:28:54,282 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-07-09 17:28:54,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:54,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:54,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:54,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:54,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:28:54,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:54,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:54,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:28:54,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:54,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:54,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:54,342 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:54,349 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:28:54,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:28:54,359 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:54,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,610 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-07-09 17:28:54,611 INFO L628 ElimStorePlain]: treesize reduction 209, result has 62.5 percent of original size [2021-07-09 17:28:54,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:54,616 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:28:54,621 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:54,626 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:54,632 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:54,636 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:54,641 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:54,646 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:54,659 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:54,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:54,663 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:54,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,780 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 17:28:54,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:54,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:54,784 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:705, output treesize:139 [2021-07-09 17:28:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:54,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245781247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:54,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:28:54,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683482193] [2021-07-09 17:28:54,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:54,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:54,927 INFO L87 Difference]: Start difference. First operand 199 states and 591 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:55,230 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-07-09 17:28:55,412 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:28:55,615 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 17:28:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:55,659 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-07-09 17:28:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:55,660 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:28:55,660 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:28:55,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:28:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:28:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2021-07-09 17:28:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.984848484848485) internal successors, (591), 198 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-07-09 17:28:55,663 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-07-09 17:28:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:55,663 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-07-09 17:28:55,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-07-09 17:28:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:55,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:55,663 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:55,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2701 [2021-07-09 17:28:55,864 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:55,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1798257188, now seen corresponding path program 65 times [2021-07-09 17:28:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594786298] [2021-07-09 17:28:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:56,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:56,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594786298] [2021-07-09 17:28:56,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594786298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:56,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027416906] [2021-07-09 17:28:56,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:56,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:56,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:56,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:56,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:56,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:56,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:56,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:56,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:28:56,191 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-07-09 17:28:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:56,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:56,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:56,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,631 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-07-09 17:28:56,632 INFO L628 ElimStorePlain]: treesize reduction 94, result has 77.0 percent of original size [2021-07-09 17:28:56,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:28:56,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,730 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-07-09 17:28:56,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:56,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:56,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:56,741 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:56,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:56,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:56,752 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:56,855 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:56,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:56,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:56,878 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:56,884 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:56,888 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:56,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:56,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:56,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:56,999 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:57,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:57,101 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:28:57,105 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:57,215 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:57,221 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:57,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:57,232 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:57,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:57,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:57,329 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:404, output treesize:170 [2021-07-09 17:28:57,473 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 17:28:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:57,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027416906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:57,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:57,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:28:57,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489501743] [2021-07-09 17:28:57,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:28:57,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:57,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:28:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:57,536 INFO L87 Difference]: Start difference. First operand 199 states and 591 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:57,845 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-07-09 17:28:58,172 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-09 17:28:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:58,238 INFO L93 Difference]: Finished difference Result 234 states and 676 transitions. [2021-07-09 17:28:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:28:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:28:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:58,239 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:28:58,239 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:28:58,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:28:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2021-07-09 17:28:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9744897959183674) internal successors, (583), 196 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-07-09 17:28:58,241 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-07-09 17:28:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:58,242 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-07-09 17:28:58,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-07-09 17:28:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:28:58,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:58,242 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:58,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:58,443 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 881305860, now seen corresponding path program 66 times [2021-07-09 17:28:58,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:58,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386315528] [2021-07-09 17:28:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:58,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:58,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386315528] [2021-07-09 17:28:58,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386315528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:58,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741731465] [2021-07-09 17:28:58,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:58,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:58,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:28:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:58,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:58,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:58,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:58,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:58,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:58,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:58,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:28:58,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:137 [2021-07-09 17:28:58,909 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-07-09 17:28:58,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:28:58,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:58,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:28:58,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:28:58,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:28:58,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:58,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:28:58,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:28:58,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:28:58,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:58,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:28:58,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:58,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:58,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:28:58,963 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:58,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:28:58,969 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,218 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2021-07-09 17:28:59,218 INFO L628 ElimStorePlain]: treesize reduction 152, result has 72.5 percent of original size [2021-07-09 17:28:59,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:59,224 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:28:59,229 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:28:59,242 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:59,247 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:59,253 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:28:59,263 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:59,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:28:59,279 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:28:59,284 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:59,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:59,296 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:28:59,301 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:59,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:28:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:28:59,312 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:59,417 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 17:28:59,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:59,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:28:59,421 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:457, output treesize:213 [2021-07-09 17:28:59,552 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-09 17:28:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741731465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:59,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:59,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:28:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834224526] [2021-07-09 17:28:59,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:59,611 INFO L87 Difference]: Start difference. First operand 197 states and 583 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:00,049 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:29:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:00,117 INFO L93 Difference]: Finished difference Result 221 states and 648 transitions. [2021-07-09 17:29:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:00,118 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:29:00,118 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:29:00,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:29:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2021-07-09 17:29:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-07-09 17:29:00,121 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-07-09 17:29:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:00,121 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-07-09 17:29:00,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-07-09 17:29:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:00,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:00,121 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:00,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2795 [2021-07-09 17:29:00,323 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1017508532, now seen corresponding path program 67 times [2021-07-09 17:29:00,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:00,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025786047] [2021-07-09 17:29:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:00,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025786047] [2021-07-09 17:29:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025786047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975127458] [2021-07-09 17:29:00,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:00,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:00,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:00,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:00,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:00,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:00,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:00,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:00,711 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:77 [2021-07-09 17:29:00,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:00,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:00,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:00,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:00,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:00,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:29:00,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:00,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:00,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:00,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:00,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:00,851 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:00,995 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-09 17:29:00,996 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-07-09 17:29:00,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:00,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:01,000 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:01,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:01,007 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:01,010 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:01,021 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:01,024 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:01,029 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:01,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:01,041 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:01,049 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:01,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:01,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:01,114 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:29:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:01,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975127458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:01,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:01,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:01,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681548699] [2021-07-09 17:29:01,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:01,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:01,257 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:01,590 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-09 17:29:01,901 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-09 17:29:02,055 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2021-07-09 17:29:02,368 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2021-07-09 17:29:02,673 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 95 [2021-07-09 17:29:02,960 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 95 [2021-07-09 17:29:03,292 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-07-09 17:29:03,640 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2021-07-09 17:29:03,956 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-07-09 17:29:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:04,017 INFO L93 Difference]: Finished difference Result 325 states and 931 transitions. [2021-07-09 17:29:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:04,018 INFO L225 Difference]: With dead ends: 325 [2021-07-09 17:29:04,018 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:29:04,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2779.5ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:29:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 202. [2021-07-09 17:29:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.9751243781094527) internal successors, (598), 201 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 598 transitions. [2021-07-09 17:29:04,021 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 598 transitions. Word has length 17 [2021-07-09 17:29:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:04,021 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 598 transitions. [2021-07-09 17:29:04,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 598 transitions. [2021-07-09 17:29:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:04,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:04,022 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:04,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,222 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash -56410218, now seen corresponding path program 68 times [2021-07-09 17:29:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:04,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601156723] [2021-07-09 17:29:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:04,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:04,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601156723] [2021-07-09 17:29:04,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601156723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092254051] [2021-07-09 17:29:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:04,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:04,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:04,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:04,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:04,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:04,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:04,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:04,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:04,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:179, output treesize:235 [2021-07-09 17:29:05,068 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_767, v_prenex_769, array_0, v_prenex_771, v_prenex_765], 1=[v_prenex_768, array_4, v_prenex_770, v_prenex_772, v_prenex_766]} [2021-07-09 17:29:05,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:05,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:05,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,185 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-07-09 17:29:05,186 INFO L628 ElimStorePlain]: treesize reduction 130, result has 57.7 percent of original size [2021-07-09 17:29:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:05,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:05,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:05,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:05,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:05,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:05,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:05,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:05,401 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:05,452 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:05,456 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:05,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:05,515 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:05,569 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:05,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:05,614 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-07-09 17:29:05,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:05,616 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-07-09 17:29:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:05,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092254051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:05,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:29:05,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727122048] [2021-07-09 17:29:05,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:05,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:05,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:05,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:05,665 INFO L87 Difference]: Start difference. First operand 202 states and 598 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,089 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-07-09 17:29:06,340 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 117 [2021-07-09 17:29:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:06,490 INFO L93 Difference]: Finished difference Result 277 states and 801 transitions. [2021-07-09 17:29:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:06,491 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:29:06,491 INFO L226 Difference]: Without dead ends: 273 [2021-07-09 17:29:06,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1109.8ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-09 17:29:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 206. [2021-07-09 17:29:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9853658536585366) internal successors, (612), 205 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 612 transitions. [2021-07-09 17:29:06,494 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 612 transitions. Word has length 17 [2021-07-09 17:29:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:06,494 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 612 transitions. [2021-07-09 17:29:06,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 612 transitions. [2021-07-09 17:29:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:06,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:06,495 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:06,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-07-09 17:29:06,695 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -303030390, now seen corresponding path program 69 times [2021-07-09 17:29:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:06,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323285730] [2021-07-09 17:29:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:06,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:06,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323285730] [2021-07-09 17:29:06,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323285730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:06,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768397958] [2021-07-09 17:29:06,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:06,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:07,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:07,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:07,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:07,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:07,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:07,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:29:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:07,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:07,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:07,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:07,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:07,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:07,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:07,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:07,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:07,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:29:07,183 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:07,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:07,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:07,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:07,195 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,342 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-09 17:29:07,343 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-07-09 17:29:07,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:07,347 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:07,351 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:07,354 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:07,358 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:07,370 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:07,374 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:07,377 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:07,390 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:07,393 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:07,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:07,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:07,460 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:29:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:07,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768397958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:07,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:07,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:29:07,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180954152] [2021-07-09 17:29:07,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:07,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:07,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:07,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:07,612 INFO L87 Difference]: Start difference. First operand 206 states and 612 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:07,994 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-09 17:29:08,223 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-09 17:29:08,447 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:29:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:08,484 INFO L93 Difference]: Finished difference Result 288 states and 834 transitions. [2021-07-09 17:29:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:08,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:08,485 INFO L225 Difference]: With dead ends: 288 [2021-07-09 17:29:08,486 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:29:08,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1041.8ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:29:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 204. [2021-07-09 17:29:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9753694581280787) internal successors, (604), 203 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 604 transitions. [2021-07-09 17:29:08,490 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 604 transitions. Word has length 17 [2021-07-09 17:29:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:08,490 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 604 transitions. [2021-07-09 17:29:08,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 604 transitions. [2021-07-09 17:29:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:08,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:08,490 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:08,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2877 [2021-07-09 17:29:08,705 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -129782698, now seen corresponding path program 70 times [2021-07-09 17:29:08,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:08,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319510695] [2021-07-09 17:29:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:08,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:08,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319510695] [2021-07-09 17:29:08,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319510695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:08,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158605630] [2021-07-09 17:29:08,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:08,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:08,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:09,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:09,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:09,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:09,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:09,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:09,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:09,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-07-09 17:29:09,398 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-07-09 17:29:09,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:09,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:09,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:09,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:09,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:09,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:09,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:09,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:09,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:09,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:09,448 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:09,454 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:09,459 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,739 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2021-07-09 17:29:09,739 INFO L628 ElimStorePlain]: treesize reduction 288, result has 57.1 percent of original size [2021-07-09 17:29:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:09,745 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:09,751 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:09,764 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:09,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:09,783 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:09,788 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:09,806 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:09,811 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:09,817 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:09,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:09,821 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:09,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,931 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 17:29:09,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:09,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:09,936 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:505, output treesize:199 [2021-07-09 17:29:10,083 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-09 17:29:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158605630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:10,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:10,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:29:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340643821] [2021-07-09 17:29:10,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:10,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:10,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:10,174 INFO L87 Difference]: Start difference. First operand 204 states and 604 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:10,568 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 17:29:10,789 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2021-07-09 17:29:10,979 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-09 17:29:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:11,068 INFO L93 Difference]: Finished difference Result 278 states and 809 transitions. [2021-07-09 17:29:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:11,069 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:29:11,069 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:29:11,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:29:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 198. [2021-07-09 17:29:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9746192893401013) internal successors, (586), 197 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-07-09 17:29:11,072 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-07-09 17:29:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:11,072 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-07-09 17:29:11,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-07-09 17:29:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:11,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:11,073 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:11,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2893 [2021-07-09 17:29:11,273 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash -28866952, now seen corresponding path program 71 times [2021-07-09 17:29:11,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:11,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316007958] [2021-07-09 17:29:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:11,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:11,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316007958] [2021-07-09 17:29:11,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316007958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737065411] [2021-07-09 17:29:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:11,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:11,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:11,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:11,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:11,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:11,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:11,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:11,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:11,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:11,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:11,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:11,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:199, output treesize:255 [2021-07-09 17:29:12,134 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_791, v_prenex_784, v_prenex_786, v_prenex_788], 1=[v_prenex_789, array_4, v_prenex_792, v_prenex_785, v_prenex_787]} [2021-07-09 17:29:12,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:12,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:12,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:12,261 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-07-09 17:29:12,262 INFO L628 ElimStorePlain]: treesize reduction 164, result has 48.9 percent of original size [2021-07-09 17:29:12,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:12,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:12,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:12,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:12,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:12,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,434 INFO L518 ElimStorePlain]: Eliminatee v_prenex_789 vanished before elimination [2021-07-09 17:29:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:12,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:12,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:12,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:12,491 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:12,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:12,535 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:12,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,568 INFO L518 ElimStorePlain]: Eliminatee v_prenex_787 vanished before elimination [2021-07-09 17:29:12,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:12,570 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:317, output treesize:53 [2021-07-09 17:29:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737065411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:12,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:12,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:29:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077290025] [2021-07-09 17:29:12,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:12,614 INFO L87 Difference]: Start difference. First operand 198 states and 586 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,102 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2021-07-09 17:29:13,403 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 127 [2021-07-09 17:29:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:13,586 INFO L93 Difference]: Finished difference Result 285 states and 823 transitions. [2021-07-09 17:29:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:13,587 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:29:13,587 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 17:29:13,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 17:29:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 204. [2021-07-09 17:29:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9852216748768474) internal successors, (606), 203 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 606 transitions. [2021-07-09 17:29:13,590 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 606 transitions. Word has length 17 [2021-07-09 17:29:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:13,590 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 606 transitions. [2021-07-09 17:29:13,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 606 transitions. [2021-07-09 17:29:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:13,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:13,590 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:13,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:13,791 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash -275487124, now seen corresponding path program 72 times [2021-07-09 17:29:13,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:13,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554135759] [2021-07-09 17:29:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:14,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554135759] [2021-07-09 17:29:14,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554135759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205659674] [2021-07-09 17:29:14,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:14,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:29:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:14,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:14,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:14,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:14,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:14,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:14,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:14,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:14,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:235 [2021-07-09 17:29:14,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:14,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:14,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:14,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,731 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-07-09 17:29:14,732 INFO L628 ElimStorePlain]: treesize reduction 233, result has 62.2 percent of original size [2021-07-09 17:29:14,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:14,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:14,850 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 17:29:14,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:14,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:14,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:14,979 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-09 17:29:14,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:14,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:14,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:29:14,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:14,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:14,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:14,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:15,002 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:15,007 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:15,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,180 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-07-09 17:29:15,181 INFO L628 ElimStorePlain]: treesize reduction 22, result has 92.7 percent of original size [2021-07-09 17:29:15,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:15,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:15,191 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:15,196 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:15,201 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:15,205 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:15,288 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:15,370 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-07-09 17:29:15,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:15,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:15,374 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:15,377 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:15,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:15,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:15,463 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:613, output treesize:135 [2021-07-09 17:29:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205659674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:15,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:29:15,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428896353] [2021-07-09 17:29:15,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:15,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:15,597 INFO L87 Difference]: Start difference. First operand 204 states and 606 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,041 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-07-09 17:29:16,382 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-07-09 17:29:16,648 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-09 17:29:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,726 INFO L93 Difference]: Finished difference Result 296 states and 856 transitions. [2021-07-09 17:29:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:16,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,727 INFO L225 Difference]: With dead ends: 296 [2021-07-09 17:29:16,727 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:29:16,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1272.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:29:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:29:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 202. [2021-07-09 17:29:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.9751243781094527) internal successors, (598), 201 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 598 transitions. [2021-07-09 17:29:16,730 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 598 transitions. Word has length 17 [2021-07-09 17:29:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,730 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 598 transitions. [2021-07-09 17:29:16,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 598 transitions. [2021-07-09 17:29:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:16,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,731 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-07-09 17:29:16,931 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,931 INFO L82 PathProgramCache]: Analyzing trace with hash -102239432, now seen corresponding path program 73 times [2021-07-09 17:29:16,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966652191] [2021-07-09 17:29:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:17,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966652191] [2021-07-09 17:29:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966652191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:17,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684939614] [2021-07-09 17:29:17,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:17,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:17,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:17,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:17,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:17,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:17,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:17,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:17,540 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-07-09 17:29:17,712 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-07-09 17:29:17,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:17,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:17,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:17,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:17,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:17,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:17,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:17,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:17,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:17,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:17,761 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:17,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:17,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:17,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:17,772 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:18,058 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-07-09 17:29:18,058 INFO L628 ElimStorePlain]: treesize reduction 276, result has 58.9 percent of original size [2021-07-09 17:29:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:18,065 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:18,071 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:18,076 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:18,090 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:18,095 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:18,100 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:18,113 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:18,118 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:18,134 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:18,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:18,139 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:18,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,253 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 17:29:18,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:18,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:18,257 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:505, output treesize:199 [2021-07-09 17:29:18,411 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-09 17:29:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:18,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684939614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:18,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:29:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188816997] [2021-07-09 17:29:18,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:18,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:18,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:18,511 INFO L87 Difference]: Start difference. First operand 202 states and 598 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,911 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-07-09 17:29:19,194 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2021-07-09 17:29:19,452 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-07-09 17:29:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,546 INFO L93 Difference]: Finished difference Result 286 states and 831 transitions. [2021-07-09 17:29:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,547 INFO L225 Difference]: With dead ends: 286 [2021-07-09 17:29:19,547 INFO L226 Difference]: Without dead ends: 282 [2021-07-09 17:29:19,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1277.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-09 17:29:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 200. [2021-07-09 17:29:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9748743718592965) internal successors, (592), 199 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 592 transitions. [2021-07-09 17:29:19,550 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 592 transitions. Word has length 17 [2021-07-09 17:29:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,550 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 592 transitions. [2021-07-09 17:29:19,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 592 transitions. [2021-07-09 17:29:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:19,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,551 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-07-09 17:29:19,751 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash -99613656, now seen corresponding path program 74 times [2021-07-09 17:29:19,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116091351] [2021-07-09 17:29:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116091351] [2021-07-09 17:29:19,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116091351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082963073] [2021-07-09 17:29:19,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:19,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:19,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:19,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:19,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:19,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:19,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:19,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:19,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:19,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:19,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:79 [2021-07-09 17:29:20,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:20,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:20,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:20,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:20,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:20,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:20,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:20,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:20,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:20,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:20,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:20,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:20,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:20,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:20,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,267 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-07-09 17:29:20,267 INFO L628 ElimStorePlain]: treesize reduction 170, result has 59.5 percent of original size [2021-07-09 17:29:20,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:20,272 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:20,275 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:20,286 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:20,290 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:20,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:20,307 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:20,310 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:20,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:20,322 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:20,325 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:20,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:20,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:20,385 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:347, output treesize:139 [2021-07-09 17:29:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082963073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:20,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:20,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385797051] [2021-07-09 17:29:20,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:20,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:20,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:20,536 INFO L87 Difference]: Start difference. First operand 200 states and 592 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:21,320 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-07-09 17:29:21,739 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-07-09 17:29:22,136 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-07-09 17:29:22,531 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2021-07-09 17:29:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:22,592 INFO L93 Difference]: Finished difference Result 328 states and 938 transitions. [2021-07-09 17:29:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:22,593 INFO L225 Difference]: With dead ends: 328 [2021-07-09 17:29:22,593 INFO L226 Difference]: Without dead ends: 320 [2021-07-09 17:29:22,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2057.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-09 17:29:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 204. [2021-07-09 17:29:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9753694581280787) internal successors, (604), 203 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 604 transitions. [2021-07-09 17:29:22,596 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 604 transitions. Word has length 17 [2021-07-09 17:29:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:22,596 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 604 transitions. [2021-07-09 17:29:22,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 604 transitions. [2021-07-09 17:29:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:22,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:22,597 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:22,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-07-09 17:29:22,813 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash 61528026, now seen corresponding path program 75 times [2021-07-09 17:29:22,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:22,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907521761] [2021-07-09 17:29:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:22,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:22,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907521761] [2021-07-09 17:29:22,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907521761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:22,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665143249] [2021-07-09 17:29:22,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:23,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:29:23,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:23,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:23,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:23,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:23,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,262 INFO L628 ElimStorePlain]: treesize reduction 16, result has 88.8 percent of original size [2021-07-09 17:29:23,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:23,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,307 INFO L628 ElimStorePlain]: treesize reduction 45, result has 59.8 percent of original size [2021-07-09 17:29:23,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:29:23,309 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:164, output treesize:67 [2021-07-09 17:29:23,396 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_811, v_prenex_813, array_0], 1=[v_prenex_812, v_prenex_814, array_4]} [2021-07-09 17:29:23,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:29:23,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:23,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,468 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-07-09 17:29:23,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:23,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:23,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:23,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:23,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:23,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:23,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:29:23,580 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:23,611 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:23,613 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:23,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:23,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:29:23,652 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-07-09 17:29:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:23,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665143249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:23,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:23,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:29:23,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914554531] [2021-07-09 17:29:23,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:23,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:23,693 INFO L87 Difference]: Start difference. First operand 204 states and 604 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:24,095 INFO L93 Difference]: Finished difference Result 245 states and 716 transitions. [2021-07-09 17:29:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:24,096 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:29:24,096 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:29:24,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:29:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 209. [2021-07-09 17:29:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9759615384615383) internal successors, (619), 208 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-07-09 17:29:24,099 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-07-09 17:29:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:24,099 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-07-09 17:29:24,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-07-09 17:29:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:24,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:24,100 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:24,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-07-09 17:29:24,300 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1542765896, now seen corresponding path program 76 times [2021-07-09 17:29:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:24,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355530865] [2021-07-09 17:29:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:24,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:24,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355530865] [2021-07-09 17:29:24,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355530865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142223018] [2021-07-09 17:29:24,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:24,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:24,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:24,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:24,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:24,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:24,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:24,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:24,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:24,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:24,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:171, output treesize:231 [2021-07-09 17:29:24,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:24,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:24,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:24,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:24,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:24,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:24,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:29:24,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:24,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:29:24,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:24,902 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:24,906 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:24,912 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:24,917 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:24,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:24,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:24,926 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,116 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-09 17:29:25,117 INFO L628 ElimStorePlain]: treesize reduction 157, result has 65.0 percent of original size [2021-07-09 17:29:25,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:25,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:25,126 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:25,137 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:25,142 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:25,147 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:25,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:25,160 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:25,164 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:25,169 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:25,172 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:25,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:25,253 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:617, output treesize:169 [2021-07-09 17:29:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:25,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142223018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:25,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 17:29:25,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374208410] [2021-07-09 17:29:25,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:25,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:25,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:25,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:25,405 INFO L87 Difference]: Start difference. First operand 209 states and 619 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,737 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 17:29:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:25,888 INFO L93 Difference]: Finished difference Result 249 states and 718 transitions. [2021-07-09 17:29:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:25,889 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:29:25,889 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:29:25,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:29:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 212. [2021-07-09 17:29:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.990521327014218) internal successors, (631), 211 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-07-09 17:29:25,892 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 17 [2021-07-09 17:29:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:25,892 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-07-09 17:29:25,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-07-09 17:29:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:25,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:25,892 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:26,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-07-09 17:29:26,109 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash -128210120, now seen corresponding path program 77 times [2021-07-09 17:29:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:26,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625546939] [2021-07-09 17:29:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:26,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625546939] [2021-07-09 17:29:26,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625546939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072823245] [2021-07-09 17:29:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:26,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:26,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:26,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:26,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:26,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:26,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:26,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:26,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:26,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:26,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:26,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,584 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-07-09 17:29:26,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:26,585 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-07-09 17:29:26,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:26,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:26,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:26,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,718 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-07-09 17:29:26,719 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-07-09 17:29:26,719 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:29:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:26,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:26,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:29:26,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:26,747 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:29:26,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_818 vanished before elimination [2021-07-09 17:29:26,748 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:29:26,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:26,748 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-07-09 17:29:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072823245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:26,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:26,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389380411] [2021-07-09 17:29:26,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:26,778 INFO L87 Difference]: Start difference. First operand 212 states and 631 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:27,483 INFO L93 Difference]: Finished difference Result 249 states and 710 transitions. [2021-07-09 17:29:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:27,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:27,484 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:29:27,484 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:29:27,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:27,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:29:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-07-09 17:29:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.975609756097561) internal successors, (610), 205 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 610 transitions. [2021-07-09 17:29:27,487 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 610 transitions. Word has length 17 [2021-07-09 17:29:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:27,487 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 610 transitions. [2021-07-09 17:29:27,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 610 transitions. [2021-07-09 17:29:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:27,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:27,488 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:27,688 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2091682306, now seen corresponding path program 78 times [2021-07-09 17:29:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:27,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169974386] [2021-07-09 17:29:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:27,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169974386] [2021-07-09 17:29:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169974386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051346495] [2021-07-09 17:29:27,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:27,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:27,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:28,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:28,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:28,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:28,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:28,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:28,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:29:28,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:28,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:28,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:28,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:28,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:28,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:29:28,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:28,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:28,183 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:28,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:28,190 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:28,194 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,336 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 17:29:28,336 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-07-09 17:29:28,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:28,340 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:28,344 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:28,348 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:28,351 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:28,362 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:28,366 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:28,369 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:28,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:28,382 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:28,385 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:28,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:28,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:28,455 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:29:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:28,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051346495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:28,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:28,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523891084] [2021-07-09 17:29:28,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:28,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:28,591 INFO L87 Difference]: Start difference. First operand 206 states and 610 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,232 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:29:29,501 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:29:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:29,560 INFO L93 Difference]: Finished difference Result 250 states and 726 transitions. [2021-07-09 17:29:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:29,561 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:29:29,561 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:29:29,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1072.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:29:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208. [2021-07-09 17:29:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.975845410628019) internal successors, (616), 207 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 616 transitions. [2021-07-09 17:29:29,564 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 616 transitions. Word has length 17 [2021-07-09 17:29:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:29,564 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 616 transitions. [2021-07-09 17:29:29,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 616 transitions. [2021-07-09 17:29:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:29,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:29,565 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:29,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-07-09 17:29:29,765 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1276876152, now seen corresponding path program 79 times [2021-07-09 17:29:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:29,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990029392] [2021-07-09 17:29:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:30,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990029392] [2021-07-09 17:29:30,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990029392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015282937] [2021-07-09 17:29:30,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:30,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:30,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:30,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:30,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:30,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:190, output treesize:180 [2021-07-09 17:29:30,535 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-07-09 17:29:30,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:30,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:30,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:30,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:30,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:30,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:30,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:30,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:30,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:30,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:30,575 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:30,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:30,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:30,592 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:30,862 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-07-09 17:29:30,862 INFO L628 ElimStorePlain]: treesize reduction 278, result has 58.8 percent of original size [2021-07-09 17:29:30,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:30,868 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:30,874 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:30,887 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:30,892 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:30,904 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:30,910 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:30,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:30,922 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:30,927 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:30,932 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:30,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:30,937 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:30,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,050 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 17:29:31,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:31,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:31,054 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:509, output treesize:208 [2021-07-09 17:29:31,203 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-09 17:29:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:31,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015282937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:31,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:29:31,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630322669] [2021-07-09 17:29:31,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:31,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:31,298 INFO L87 Difference]: Start difference. First operand 208 states and 616 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,730 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-07-09 17:29:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:31,831 INFO L93 Difference]: Finished difference Result 236 states and 693 transitions. [2021-07-09 17:29:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:31,831 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:29:31,832 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:29:31,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:29:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 206. [2021-07-09 17:29:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.975609756097561) internal successors, (610), 205 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 610 transitions. [2021-07-09 17:29:31,834 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 610 transitions. Word has length 17 [2021-07-09 17:29:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:31,834 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 610 transitions. [2021-07-09 17:29:31,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 610 transitions. [2021-07-09 17:29:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:31,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:31,835 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:32,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:32,035 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:32,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1996192008, now seen corresponding path program 80 times [2021-07-09 17:29:32,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:32,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621547438] [2021-07-09 17:29:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:32,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621547438] [2021-07-09 17:29:32,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621547438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820380601] [2021-07-09 17:29:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:32,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:32,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:32,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:32,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:32,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:32,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:32,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:32,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-07-09 17:29:32,540 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_824, v_prenex_826, array_2, v_prenex_828], 1=[v_prenex_825, v_prenex_827, array_4, v_prenex_829]} [2021-07-09 17:29:32,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:32,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:32,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:32,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,737 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 17:29:32,738 INFO L628 ElimStorePlain]: treesize reduction 197, result has 62.3 percent of original size [2021-07-09 17:29:32,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:32,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:32,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:32,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:32,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:32,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:32,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:32,939 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:29:32,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:32,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:32,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:32,951 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,081 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-09 17:29:33,081 INFO L628 ElimStorePlain]: treesize reduction 49, result has 82.9 percent of original size [2021-07-09 17:29:33,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:33,085 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:33,088 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:33,160 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:33,163 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,230 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:29:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:33,234 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:33,238 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:33,242 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:33,246 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:33,249 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:33,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:33,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:33,316 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:29:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820380601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:33,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:33,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560565832] [2021-07-09 17:29:33,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:33,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:33,466 INFO L87 Difference]: Start difference. First operand 206 states and 610 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,935 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-09 17:29:34,180 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-09 17:29:34,376 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 17:29:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:34,596 INFO L93 Difference]: Finished difference Result 262 states and 749 transitions. [2021-07-09 17:29:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:34,597 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:29:34,597 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:29:34,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1172.2ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:29:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-07-09 17:29:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9759615384615383) internal successors, (619), 208 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-07-09 17:29:34,601 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-07-09 17:29:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:34,601 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-07-09 17:29:34,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,601 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-07-09 17:29:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:34,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:34,601 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:34,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3216 [2021-07-09 17:29:34,813 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608496, now seen corresponding path program 81 times [2021-07-09 17:29:34,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:34,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808806905] [2021-07-09 17:29:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:34,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808806905] [2021-07-09 17:29:34,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808806905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623002782] [2021-07-09 17:29:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:34,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:34,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:34,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:35,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:35,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:35,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:35,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:35,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:35,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:35,170 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:196, output treesize:186 [2021-07-09 17:29:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:35,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:35,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:35,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:35,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:35,374 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:35,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:35,389 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:35,396 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:35,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:35,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:35,413 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,722 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2021-07-09 17:29:35,722 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.2 percent of original size [2021-07-09 17:29:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:35,728 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:35,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:35,746 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:35,751 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:35,764 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:35,769 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:35,774 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:35,779 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:35,796 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:35,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:35,800 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:35,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,911 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 17:29:35,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:35,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:35,915 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:525, output treesize:199 [2021-07-09 17:29:36,058 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-09 17:29:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623002782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:36,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:29:36,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160514579] [2021-07-09 17:29:36,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:36,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:36,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:36,153 INFO L87 Difference]: Start difference. First operand 209 states and 619 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:36,526 INFO L93 Difference]: Finished difference Result 237 states and 696 transitions. [2021-07-09 17:29:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:29:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:36,527 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:29:36,527 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:29:36,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:29:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2021-07-09 17:29:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9759615384615383) internal successors, (619), 208 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-07-09 17:29:36,530 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-07-09 17:29:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:36,530 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-07-09 17:29:36,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-07-09 17:29:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:36,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:36,531 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:36,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,731 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:36,731 INFO L82 PathProgramCache]: Analyzing trace with hash -573434050, now seen corresponding path program 82 times [2021-07-09 17:29:36,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:36,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841255070] [2021-07-09 17:29:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:36,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841255070] [2021-07-09 17:29:36,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841255070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408464680] [2021-07-09 17:29:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:36,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:36,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:36,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:36,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:36,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:36,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:37,035 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:159 [2021-07-09 17:29:37,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:37,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:37,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:37,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:37,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:37,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:37,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,487 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-09 17:29:37,487 INFO L628 ElimStorePlain]: treesize reduction 240, result has 59.0 percent of original size [2021-07-09 17:29:37,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:37,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:37,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:37,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:37,514 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:37,530 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:37,536 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:37,549 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,653 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-09 17:29:37,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:37,659 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:37,664 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:37,668 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:37,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:37,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:37,764 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:37,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:37,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:37,853 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:454, output treesize:171 [2021-07-09 17:29:38,044 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-09 17:29:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:38,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408464680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:38,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:38,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:29:38,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834104460] [2021-07-09 17:29:38,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:38,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:38,102 INFO L87 Difference]: Start difference. First operand 209 states and 619 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,418 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 17:29:38,577 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-07-09 17:29:38,731 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-07-09 17:29:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:38,787 INFO L93 Difference]: Finished difference Result 250 states and 724 transitions. [2021-07-09 17:29:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:38,788 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:29:38,788 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:29:38,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 922.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:29:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 205. [2021-07-09 17:29:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9754901960784315) internal successors, (607), 204 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 607 transitions. [2021-07-09 17:29:38,791 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 607 transitions. Word has length 17 [2021-07-09 17:29:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:38,791 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 607 transitions. [2021-07-09 17:29:38,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 607 transitions. [2021-07-09 17:29:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:38,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:38,791 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:38,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:38,992 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1205884026, now seen corresponding path program 83 times [2021-07-09 17:29:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:38,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654695608] [2021-07-09 17:29:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654695608] [2021-07-09 17:29:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654695608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804379568] [2021-07-09 17:29:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:39,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:39,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:39,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:39,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:39,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:39,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:39,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:39,376 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:29:39,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:39,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:39,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:39,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:39,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:39,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:39,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:29:39,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:39,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:39,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:39,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:39,498 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:39,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:39,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,648 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 17:29:39,649 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-07-09 17:29:39,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:39,653 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:39,657 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:39,661 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:39,665 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:39,677 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:39,681 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:39,684 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:39,698 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:39,701 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:39,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:39,768 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:29:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804379568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:39,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161466106] [2021-07-09 17:29:39,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:39,903 INFO L87 Difference]: Start difference. First operand 205 states and 607 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,333 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-09 17:29:40,482 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-07-09 17:29:40,657 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:29:40,926 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:29:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:40,980 INFO L93 Difference]: Finished difference Result 268 states and 778 transitions. [2021-07-09 17:29:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:40,995 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:29:40,995 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:29:40,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1158.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:29:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 209. [2021-07-09 17:29:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9759615384615383) internal successors, (619), 208 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-07-09 17:29:41,003 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-07-09 17:29:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:41,003 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-07-09 17:29:41,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-07-09 17:29:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:41,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:41,003 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:41,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3305 [2021-07-09 17:29:41,217 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash 391077872, now seen corresponding path program 84 times [2021-07-09 17:29:41,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:41,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982333408] [2021-07-09 17:29:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982333408] [2021-07-09 17:29:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982333408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213553625] [2021-07-09 17:29:41,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:41,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:41,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:41,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:41,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:41,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:41,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:41,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:41,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:41,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:41,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:137 [2021-07-09 17:29:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:41,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:41,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:41,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:41,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:41,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:41,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:41,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:41,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:41,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:41,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:41,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:41,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:41,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:41,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,105 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-07-09 17:29:42,105 INFO L628 ElimStorePlain]: treesize reduction 142, result has 71.8 percent of original size [2021-07-09 17:29:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:42,110 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:42,115 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:42,119 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:29:42,131 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:42,136 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:42,141 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:42,157 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:42,161 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:42,174 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:42,178 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:42,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:42,183 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:42,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:42,290 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:407, output treesize:173 [2021-07-09 17:29:42,431 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 17:29:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:42,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213553625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:42,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:29:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294202680] [2021-07-09 17:29:42,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:42,490 INFO L87 Difference]: Start difference. First operand 209 states and 619 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:42,957 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:29:43,149 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-09 17:29:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:43,220 INFO L93 Difference]: Finished difference Result 253 states and 742 transitions. [2021-07-09 17:29:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:43,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:43,221 INFO L225 Difference]: With dead ends: 253 [2021-07-09 17:29:43,221 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:29:43,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 950.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:29:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-07-09 17:29:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9757281553398056) internal successors, (613), 206 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-07-09 17:29:43,224 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-07-09 17:29:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:43,224 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-07-09 17:29:43,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-07-09 17:29:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:43,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:43,224 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:43,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,438 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash 981448970, now seen corresponding path program 85 times [2021-07-09 17:29:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770211942] [2021-07-09 17:29:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:43,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770211942] [2021-07-09 17:29:43,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770211942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085376791] [2021-07-09 17:29:43,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:43,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:43,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:43,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:43,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:43,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:43,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:43,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:43,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:43,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:43,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:43,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:43,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:43,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:143, output treesize:133 [2021-07-09 17:29:43,990 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-07-09 17:29:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:43,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:43,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:44,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:44,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:44,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:44,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:44,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:44,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:44,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:44,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:44,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,206 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2021-07-09 17:29:44,206 INFO L628 ElimStorePlain]: treesize reduction 156, result has 63.8 percent of original size [2021-07-09 17:29:44,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:44,212 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:44,217 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:44,230 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:44,234 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:44,247 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:44,252 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:44,256 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:29:44,268 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:44,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:44,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:29:44,343 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 10 variables, input treesize:365, output treesize:135 [2021-07-09 17:29:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:44,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085376791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:44,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:29:44,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860584415] [2021-07-09 17:29:44,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:44,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:44,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:44,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:44,518 INFO L87 Difference]: Start difference. First operand 207 states and 613 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,265 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 105 [2021-07-09 17:29:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:45,364 INFO L93 Difference]: Finished difference Result 293 states and 852 transitions. [2021-07-09 17:29:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:45,365 INFO L225 Difference]: With dead ends: 293 [2021-07-09 17:29:45,365 INFO L226 Difference]: Without dead ends: 289 [2021-07-09 17:29:45,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 904.3ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-09 17:29:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 205. [2021-07-09 17:29:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9754901960784315) internal successors, (607), 204 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 607 transitions. [2021-07-09 17:29:45,368 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 607 transitions. Word has length 17 [2021-07-09 17:29:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:45,368 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 607 transitions. [2021-07-09 17:29:45,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,368 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 607 transitions. [2021-07-09 17:29:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:45,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:45,368 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:45,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:45,569 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash 527178728, now seen corresponding path program 86 times [2021-07-09 17:29:45,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:45,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354290743] [2021-07-09 17:29:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:45,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:45,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354290743] [2021-07-09 17:29:45,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354290743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176812443] [2021-07-09 17:29:45,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:45,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:45,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:45,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:45,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:45,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:45,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:45,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:45,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:46,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-07-09 17:29:46,130 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_849, v_prenex_851, v_prenex_853], 1=[array_4, v_prenex_850, v_prenex_852, v_prenex_854]} [2021-07-09 17:29:46,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:46,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:46,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,323 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 17:29:46,324 INFO L628 ElimStorePlain]: treesize reduction 191, result has 62.3 percent of original size [2021-07-09 17:29:46,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:46,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:46,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:46,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:46,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:29:46,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:46,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:46,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:46,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:46,530 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:46,533 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,667 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 17:29:46,667 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.3 percent of original size [2021-07-09 17:29:46,668 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:29:46,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:46,671 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:46,675 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:46,748 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:46,751 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:46,825 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:46,829 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:46,832 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:46,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:46,836 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:46,839 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:46,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:46,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:46,901 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:29:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:47,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176812443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:47,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:47,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:29:47,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014151246] [2021-07-09 17:29:47,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:29:47,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:47,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:29:47,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:47,039 INFO L87 Difference]: Start difference. First operand 205 states and 607 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,625 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2021-07-09 17:29:47,806 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 17:29:48,001 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-07-09 17:29:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:48,033 INFO L93 Difference]: Finished difference Result 262 states and 761 transitions. [2021-07-09 17:29:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:48,034 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:29:48,034 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:29:48,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1201.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:29:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-07-09 17:29:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9759615384615383) internal successors, (619), 208 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-07-09 17:29:48,037 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-07-09 17:29:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:48,037 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-07-09 17:29:48,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-07-09 17:29:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:48,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:48,038 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:48,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-07-09 17:29:48,245 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash 869762240, now seen corresponding path program 87 times [2021-07-09 17:29:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:48,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997254566] [2021-07-09 17:29:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:48,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997254566] [2021-07-09 17:29:48,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997254566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39992689] [2021-07-09 17:29:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:48,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:48,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:29:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:48,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:48,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:48,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:48,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:48,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:29:48,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:196, output treesize:186 [2021-07-09 17:29:48,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:29:48,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:48,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:48,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:48,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:48,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:48,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:48,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:48,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:48,858 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:48,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:48,871 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:48,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:48,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:48,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:49,157 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2021-07-09 17:29:49,157 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.2 percent of original size [2021-07-09 17:29:49,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:49,163 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:49,169 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:49,174 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:49,187 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:49,192 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:29:49,204 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:49,209 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:29:49,227 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:49,232 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:49,247 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:49,361 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 17:29:49,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:49,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:49,366 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:525, output treesize:199 [2021-07-09 17:29:49,509 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-09 17:29:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39992689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 17:29:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106108426] [2021-07-09 17:29:49,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:49,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:49,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:49,604 INFO L87 Difference]: Start difference. First operand 209 states and 619 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:50,100 INFO L93 Difference]: Finished difference Result 252 states and 741 transitions. [2021-07-09 17:29:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:50,101 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:29:50,101 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:29:50,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 692.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:29:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2021-07-09 17:29:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9757281553398056) internal successors, (613), 206 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-07-09 17:29:50,104 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-07-09 17:29:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:50,104 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-07-09 17:29:50,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-07-09 17:29:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:50,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:50,104 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:50,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3403,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,309 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1237021880, now seen corresponding path program 88 times [2021-07-09 17:29:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678693185] [2021-07-09 17:29:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:50,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678693185] [2021-07-09 17:29:50,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678693185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430726443] [2021-07-09 17:29:50,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:50,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:50,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:50,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:50,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:50,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:50,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:50,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:50,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:125, output treesize:115 [2021-07-09 17:29:50,749 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_860, v_prenex_862, v_prenex_864], 1=[array_0, v_prenex_859, v_prenex_861, v_prenex_863]} [2021-07-09 17:29:50,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:50,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:50,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:50,920 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-07-09 17:29:50,921 INFO L628 ElimStorePlain]: treesize reduction 147, result has 64.8 percent of original size [2021-07-09 17:29:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:29:50,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:50,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:50,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:50,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:50,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:29:50,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,084 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-07-09 17:29:51,085 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.5 percent of original size [2021-07-09 17:29:51,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:29:51,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,212 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-07-09 17:29:51,212 INFO L628 ElimStorePlain]: treesize reduction 30, result has 88.7 percent of original size [2021-07-09 17:29:51,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:51,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:51,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:51,288 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:51,292 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:51,366 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:51,369 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:51,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:51,386 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:51,389 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,446 INFO L518 ElimStorePlain]: Eliminatee v_prenex_861 vanished before elimination [2021-07-09 17:29:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:51,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:51,450 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:51,453 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:51,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:51,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:51,518 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-07-09 17:29:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430726443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:51,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:29:51,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628632917] [2021-07-09 17:29:51,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:29:51,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:51,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:29:51,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:29:51,665 INFO L87 Difference]: Start difference. First operand 207 states and 613 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,131 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-09 17:29:52,385 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-07-09 17:29:52,670 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-07-09 17:29:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,714 INFO L93 Difference]: Finished difference Result 299 states and 862 transitions. [2021-07-09 17:29:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:29:52,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,715 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:29:52,715 INFO L226 Difference]: Without dead ends: 291 [2021-07-09 17:29:52,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-09 17:29:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 207. [2021-07-09 17:29:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9757281553398056) internal successors, (613), 206 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-07-09 17:29:52,718 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-07-09 17:29:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-07-09 17:29:52,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-07-09 17:29:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:52,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,718 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:52,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-07-09 17:29:52,931 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash -176185004, now seen corresponding path program 89 times [2021-07-09 17:29:52,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:52,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566609445] [2021-07-09 17:29:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566609445] [2021-07-09 17:29:53,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566609445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366623414] [2021-07-09 17:29:53,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:53,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:53,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,503 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-09 17:29:53,504 INFO L628 ElimStorePlain]: treesize reduction 32, result has 88.6 percent of original size [2021-07-09 17:29:53,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:53,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:53,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,639 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-07-09 17:29:53,639 INFO L628 ElimStorePlain]: treesize reduction 76, result has 66.7 percent of original size [2021-07-09 17:29:53,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:53,640 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:218, output treesize:152 [2021-07-09 17:29:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:29:53,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:53,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:53,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:53,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:53,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:53,781 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,786 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:53,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:53,796 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:53,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:29:53,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:53,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:53,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:53,993 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-07-09 17:29:53,994 INFO L628 ElimStorePlain]: treesize reduction 380, result has 42.6 percent of original size [2021-07-09 17:29:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:53,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:53,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:54,002 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:54,015 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:54,019 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:54,023 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:54,027 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:54,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:54,037 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:54,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:54,041 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:54,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:54,050 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:54,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:54,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:29:54,120 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:507, output treesize:183 [2021-07-09 17:29:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366623414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:54,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:29:54,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947869702] [2021-07-09 17:29:54,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:29:54,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:54,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:29:54,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:29:54,292 INFO L87 Difference]: Start difference. First operand 207 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,894 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-07-09 17:29:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,976 INFO L93 Difference]: Finished difference Result 282 states and 800 transitions. [2021-07-09 17:29:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:54,977 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,977 INFO L225 Difference]: With dead ends: 282 [2021-07-09 17:29:54,977 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:29:54,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:29:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 219. [2021-07-09 17:29:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:29:54,980 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:29:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,980 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:29:54,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:29:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:54,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,981 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:55,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,181 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1305052866, now seen corresponding path program 90 times [2021-07-09 17:29:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:55,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787385620] [2021-07-09 17:29:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:55,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787385620] [2021-07-09 17:29:55,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787385620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188079014] [2021-07-09 17:29:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:55,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:55,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:55,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:55,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:55,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:55,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:55,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:55,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,543 INFO L628 ElimStorePlain]: treesize reduction 23, result has 85.4 percent of original size [2021-07-09 17:29:55,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:55,545 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:181, output treesize:134 [2021-07-09 17:29:55,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:55,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:55,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,747 INFO L628 ElimStorePlain]: treesize reduction 129, result has 24.6 percent of original size [2021-07-09 17:29:55,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_867 vanished before elimination [2021-07-09 17:29:55,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_868 vanished before elimination [2021-07-09 17:29:55,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_869 vanished before elimination [2021-07-09 17:29:55,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:29:55,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:55,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:55,759 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:29:55,759 INFO L518 ElimStorePlain]: Eliminatee v_prenex_870 vanished before elimination [2021-07-09 17:29:55,759 INFO L518 ElimStorePlain]: Eliminatee v_prenex_871 vanished before elimination [2021-07-09 17:29:55,759 INFO L518 ElimStorePlain]: Eliminatee v_prenex_872 vanished before elimination [2021-07-09 17:29:55,759 INFO L518 ElimStorePlain]: Eliminatee v_prenex_873 vanished before elimination [2021-07-09 17:29:55,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:29:55,760 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:207, output treesize:26 [2021-07-09 17:29:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188079014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:55,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:29:55,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588584956] [2021-07-09 17:29:55,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:29:55,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:29:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:29:55,792 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:56,235 INFO L93 Difference]: Finished difference Result 268 states and 771 transitions. [2021-07-09 17:29:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:29:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:56,236 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:29:56,236 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:29:56,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:29:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:29:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 219. [2021-07-09 17:29:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:29:56,239 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:29:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:56,239 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:29:56,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:29:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:56,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:56,239 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:56,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3502 [2021-07-09 17:29:56,441 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash 733598060, now seen corresponding path program 91 times [2021-07-09 17:29:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8918489] [2021-07-09 17:29:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:56,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8918489] [2021-07-09 17:29:56,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8918489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350223095] [2021-07-09 17:29:56,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:56,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:56,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:56,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:56,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:56,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:29:56,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:29:56,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:56,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:29:56,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-07-09 17:29:56,899 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-07-09 17:29:56,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:56,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:56,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:56,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:29:56,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:56,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:56,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:56,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:29:56,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:29:56,954 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:56,958 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:29:56,962 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:56,966 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:56,971 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:56,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:29:56,975 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,115 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-09 17:29:57,115 INFO L628 ElimStorePlain]: treesize reduction 187, result has 56.0 percent of original size [2021-07-09 17:29:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:57,119 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:57,123 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:29:57,126 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:57,130 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:29:57,133 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:29:57,143 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:29:57,147 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:57,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:29:57,151 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:29:57,160 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:57,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:57,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:29:57,221 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:521, output treesize:139 [2021-07-09 17:29:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350223095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:57,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:29:57,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799964379] [2021-07-09 17:29:57,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:29:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:29:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:29:57,361 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:57,751 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-07-09 17:29:57,936 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 17:29:58,167 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-07-09 17:29:58,444 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-07-09 17:29:58,707 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-07-09 17:29:58,972 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-07-09 17:29:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,028 INFO L93 Difference]: Finished difference Result 380 states and 1054 transitions. [2021-07-09 17:29:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:29:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,029 INFO L225 Difference]: With dead ends: 380 [2021-07-09 17:29:59,029 INFO L226 Difference]: Without dead ends: 368 [2021-07-09 17:29:59,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1693.3ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-07-09 17:29:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 225. [2021-07-09 17:29:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.0) internal successors, (672), 224 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 672 transitions. [2021-07-09 17:29:59,033 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 672 transitions. Word has length 17 [2021-07-09 17:29:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,033 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 672 transitions. [2021-07-09 17:29:59,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 672 transitions. [2021-07-09 17:29:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:29:59,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,033 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,234 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1233515728, now seen corresponding path program 92 times [2021-07-09 17:29:59,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252080497] [2021-07-09 17:29:59,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252080497] [2021-07-09 17:29:59,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252080497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229654080] [2021-07-09 17:29:59,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:29:59,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:59,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,877 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 17:29:59,878 INFO L628 ElimStorePlain]: treesize reduction 50, result has 78.9 percent of original size [2021-07-09 17:29:59,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:29:59,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:59,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:29:59,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:59,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:29:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:29:59,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:59,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-07-09 17:30:00,005 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:251, output treesize:182 [2021-07-09 17:30:00,234 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 6=[array_0]} [2021-07-09 17:30:00,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:00,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:00,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:00,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:00,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:00,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:30:00,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:00,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:30:00,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,426 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-07-09 17:30:00,427 INFO L628 ElimStorePlain]: treesize reduction 32, result has 87.9 percent of original size [2021-07-09 17:30:00,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:30:00,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:00,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:00,440 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:30:00,445 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:00,450 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:00,454 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:00,466 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:00,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:00,470 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:00,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:00,536 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:301, output treesize:57 [2021-07-09 17:30:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:00,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229654080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:00,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 17:30:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301007978] [2021-07-09 17:30:00,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:00,578 INFO L87 Difference]: Start difference. First operand 225 states and 672 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,987 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-07-09 17:30:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:01,196 INFO L93 Difference]: Finished difference Result 278 states and 806 transitions. [2021-07-09 17:30:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:01,197 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:30:01,197 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:30:01,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 812.2ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:30:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 228. [2021-07-09 17:30:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.0) internal successors, (681), 227 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 681 transitions. [2021-07-09 17:30:01,200 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 681 transitions. Word has length 17 [2021-07-09 17:30:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:01,200 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 681 transitions. [2021-07-09 17:30:01,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 681 transitions. [2021-07-09 17:30:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:01,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:01,201 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:01,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-09 17:30:01,401 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash 247722142, now seen corresponding path program 93 times [2021-07-09 17:30:01,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:01,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276829981] [2021-07-09 17:30:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:01,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276829981] [2021-07-09 17:30:01,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276829981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101363497] [2021-07-09 17:30:01,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:01,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:01,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:01,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:01,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:01,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:01,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:01,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:01,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:01,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,048 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-07-09 17:30:02,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:02,050 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-07-09 17:30:02,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:02,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:02,203 INFO L628 ElimStorePlain]: treesize reduction 46, result has 74.2 percent of original size [2021-07-09 17:30:02,203 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:02,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:02,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,245 INFO L628 ElimStorePlain]: treesize reduction 33, result has 71.6 percent of original size [2021-07-09 17:30:02,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_883 vanished before elimination [2021-07-09 17:30:02,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:02,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:02,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:02,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:02,273 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:30:02,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_885 vanished before elimination [2021-07-09 17:30:02,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:02,274 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-07-09 17:30:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101363497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:02,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 17:30:02,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527246071] [2021-07-09 17:30:02,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:02,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:02,311 INFO L87 Difference]: Start difference. First operand 228 states and 681 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,880 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-07-09 17:30:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,910 INFO L93 Difference]: Finished difference Result 278 states and 807 transitions. [2021-07-09 17:30:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,911 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:30:02,911 INFO L226 Difference]: Without dead ends: 274 [2021-07-09 17:30:02,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-07-09 17:30:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 226. [2021-07-09 17:30:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.0044444444444443) internal successors, (676), 225 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-07-09 17:30:02,914 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-07-09 17:30:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,914 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-07-09 17:30:02,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-07-09 17:30:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:02,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,915 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:03,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-07-09 17:30:03,115 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:03,116 INFO L82 PathProgramCache]: Analyzing trace with hash -297453036, now seen corresponding path program 94 times [2021-07-09 17:30:03,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:03,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368233928] [2021-07-09 17:30:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:03,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368233928] [2021-07-09 17:30:03,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368233928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552318706] [2021-07-09 17:30:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:03,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:03,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:03,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:03,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:03,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:03,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:03,568 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:30:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:03,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:03,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:03,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:03,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:03,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:03,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:03,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:03,675 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:30:03,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:03,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:03,684 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:03,689 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:03,692 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,844 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-09 17:30:03,844 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-07-09 17:30:03,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:03,848 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:03,852 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:03,856 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:03,859 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:03,871 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:03,874 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:03,878 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:03,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:03,890 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:03,893 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:03,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:03,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:03,963 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:30:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552318706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:04,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439978603] [2021-07-09 17:30:04,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:04,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:04,096 INFO L87 Difference]: Start difference. First operand 226 states and 676 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,624 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-07-09 17:30:04,873 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-07-09 17:30:05,061 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:30:05,329 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:30:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:05,379 INFO L93 Difference]: Finished difference Result 308 states and 887 transitions. [2021-07-09 17:30:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:05,380 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:30:05,380 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:30:05,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1392.3ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:30:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2021-07-09 17:30:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.0044444444444443) internal successors, (676), 225 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-07-09 17:30:05,383 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-07-09 17:30:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,383 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-07-09 17:30:05,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-07-09 17:30:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:05,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,384 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:05,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3639 [2021-07-09 17:30:05,597 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2016424066, now seen corresponding path program 95 times [2021-07-09 17:30:05,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:05,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852725673] [2021-07-09 17:30:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:05,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852725673] [2021-07-09 17:30:05,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852725673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524393216] [2021-07-09 17:30:05,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:05,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:05,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:05,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:05,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:05,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:05,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:05,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:05,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:05,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:05,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:211 [2021-07-09 17:30:06,114 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_888, array_2, v_prenex_890, v_prenex_886], 1=[v_prenex_889, array_4, v_prenex_891, v_prenex_887]} [2021-07-09 17:30:06,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:06,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:06,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:06,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,321 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-07-09 17:30:06,322 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.6 percent of original size [2021-07-09 17:30:06,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:06,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:06,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:30:06,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:06,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:06,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:06,437 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:06,441 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,568 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-07-09 17:30:06,568 INFO L628 ElimStorePlain]: treesize reduction 21, result has 91.8 percent of original size [2021-07-09 17:30:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:06,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:06,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:06,644 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:06,648 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,723 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:06,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:06,728 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:06,732 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:06,736 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:06,740 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:06,743 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:06,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:06,808 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:06,811 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:06,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:06,880 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:30:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524393216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:07,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116428158] [2021-07-09 17:30:07,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:07,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:07,028 INFO L87 Difference]: Start difference. First operand 226 states and 676 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,519 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-07-09 17:30:07,705 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:30:07,883 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-09 17:30:08,187 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 17:30:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,247 INFO L93 Difference]: Finished difference Result 316 states and 900 transitions. [2021-07-09 17:30:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:08,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,248 INFO L225 Difference]: With dead ends: 316 [2021-07-09 17:30:08,248 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:30:08,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1306.1ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:30:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 225. [2021-07-09 17:30:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.0) internal successors, (672), 224 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 672 transitions. [2021-07-09 17:30:08,251 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 672 transitions. Word has length 17 [2021-07-09 17:30:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,251 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 672 transitions. [2021-07-09 17:30:08,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 672 transitions. [2021-07-09 17:30:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:08,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,251 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:08,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3655,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,452 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:08,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1942193160, now seen corresponding path program 96 times [2021-07-09 17:30:08,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:08,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435799659] [2021-07-09 17:30:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:08,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435799659] [2021-07-09 17:30:08,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435799659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723845001] [2021-07-09 17:30:08,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:08,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:08,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:08,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:08,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:08,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:08,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:08,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:08,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:08,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:08,849 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:203, output treesize:193 [2021-07-09 17:30:09,359 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 104 [2021-07-09 17:30:09,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:09,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:09,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:09,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:10,077 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 119 [2021-07-09 17:30:10,078 INFO L628 ElimStorePlain]: treesize reduction 177, result has 63.4 percent of original size [2021-07-09 17:30:10,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:10,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,184 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 17:30:10,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_912 vanished before elimination [2021-07-09 17:30:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:10,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:10,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:10,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:30:10,310 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:10,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:10,510 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:10,601 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:10,607 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:10,695 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,773 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:10,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:10,779 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:10,861 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:10,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:10,865 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:10,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:10,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:30:10,950 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:482, output treesize:66 [2021-07-09 17:30:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:11,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723845001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:11,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:11,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:30:11,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290984368] [2021-07-09 17:30:11,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:11,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:11,001 INFO L87 Difference]: Start difference. First operand 225 states and 672 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,575 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 153 [2021-07-09 17:30:12,108 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 188 [2021-07-09 17:30:12,404 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 163 [2021-07-09 17:30:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:12,475 INFO L93 Difference]: Finished difference Result 347 states and 980 transitions. [2021-07-09 17:30:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:12,476 INFO L225 Difference]: With dead ends: 347 [2021-07-09 17:30:12,476 INFO L226 Difference]: Without dead ends: 343 [2021-07-09 17:30:12,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1775.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-09 17:30:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 224. [2021-07-09 17:30:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.995515695067265) internal successors, (668), 223 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 668 transitions. [2021-07-09 17:30:12,480 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 668 transitions. Word has length 17 [2021-07-09 17:30:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:12,480 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 668 transitions. [2021-07-09 17:30:12,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 668 transitions. [2021-07-09 17:30:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:12,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:12,480 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:12,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3673,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,681 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 933193372, now seen corresponding path program 97 times [2021-07-09 17:30:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:12,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62406802] [2021-07-09 17:30:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62406802] [2021-07-09 17:30:12,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62406802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154144388] [2021-07-09 17:30:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:13,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:13,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:13,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:13,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:13,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:13,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:13,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:13,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:13,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:13,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:13,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:173 [2021-07-09 17:30:13,605 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 106 [2021-07-09 17:30:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:13,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:13,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:13,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:13,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,038 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 81 [2021-07-09 17:30:14,039 INFO L628 ElimStorePlain]: treesize reduction 204, result has 52.0 percent of original size [2021-07-09 17:30:14,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_944 vanished before elimination [2021-07-09 17:30:14,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:14,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:14,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,176 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-07-09 17:30:14,176 INFO L628 ElimStorePlain]: treesize reduction 11, result has 94.7 percent of original size [2021-07-09 17:30:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:14,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:14,187 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:14,255 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:14,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:30:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:14,391 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:14,395 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,497 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-09 17:30:14,498 INFO L628 ElimStorePlain]: treesize reduction 30, result has 79.5 percent of original size [2021-07-09 17:30:14,498 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:14,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:14,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:14,502 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:14,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_941 vanished before elimination [2021-07-09 17:30:14,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_942 vanished before elimination [2021-07-09 17:30:14,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:30:14,549 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:439, output treesize:31 [2021-07-09 17:30:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154144388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:30:14,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302242130] [2021-07-09 17:30:14,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:14,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:14,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:14,595 INFO L87 Difference]: Start difference. First operand 224 states and 668 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,184 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2021-07-09 17:30:15,657 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 155 [2021-07-09 17:30:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:15,898 INFO L93 Difference]: Finished difference Result 320 states and 915 transitions. [2021-07-09 17:30:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:15,899 INFO L225 Difference]: With dead ends: 320 [2021-07-09 17:30:15,899 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:30:15,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1527.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:30:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 223. [2021-07-09 17:30:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.990990990990991) internal successors, (664), 222 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 664 transitions. [2021-07-09 17:30:15,902 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 664 transitions. Word has length 17 [2021-07-09 17:30:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:15,903 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 664 transitions. [2021-07-09 17:30:15,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 664 transitions. [2021-07-09 17:30:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:15,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:15,903 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-07-09 17:30:16,108 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash 267189852, now seen corresponding path program 98 times [2021-07-09 17:30:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:16,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048035461] [2021-07-09 17:30:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:16,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:16,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048035461] [2021-07-09 17:30:16,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048035461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560610076] [2021-07-09 17:30:16,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:16,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:16,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:16,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:16,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:16,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:16,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:16,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:16,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:16,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:213 [2021-07-09 17:30:16,842 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_954, v_prenex_956, array_2, v_prenex_952], 1=[v_prenex_955, v_prenex_957, array_4, v_prenex_953]} [2021-07-09 17:30:16,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:16,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:16,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:16,934 INFO L628 ElimStorePlain]: treesize reduction 158, result has 38.8 percent of original size [2021-07-09 17:30:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:16,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:16,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:16,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:16,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:16,993 INFO L518 ElimStorePlain]: Eliminatee v_prenex_952 vanished before elimination [2021-07-09 17:30:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:16,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:17,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:17,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:17,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:17,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:17,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:17,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_957 vanished before elimination [2021-07-09 17:30:17,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:17,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:17,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:17,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:17,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:17,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:17,040 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:17,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:17,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:17,072 INFO L518 ElimStorePlain]: Eliminatee v_prenex_953 vanished before elimination [2021-07-09 17:30:17,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:30:17,074 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:254, output treesize:41 [2021-07-09 17:30:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560610076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:17,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:30:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124839663] [2021-07-09 17:30:17,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:17,122 INFO L87 Difference]: Start difference. First operand 223 states and 664 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,556 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-07-09 17:30:17,834 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 17:30:18,150 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 62 [2021-07-09 17:30:18,445 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-09 17:30:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:18,486 INFO L93 Difference]: Finished difference Result 317 states and 906 transitions. [2021-07-09 17:30:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:18,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:18,487 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:30:18,487 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 17:30:18,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1517.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 17:30:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-07-09 17:30:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.981900452488688) internal successors, (659), 221 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 659 transitions. [2021-07-09 17:30:18,491 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 659 transitions. Word has length 17 [2021-07-09 17:30:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:18,491 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 659 transitions. [2021-07-09 17:30:18,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 659 transitions. [2021-07-09 17:30:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:18,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:18,492 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:18,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-07-09 17:30:18,692 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1878980908, now seen corresponding path program 99 times [2021-07-09 17:30:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:18,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675739557] [2021-07-09 17:30:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:18,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675739557] [2021-07-09 17:30:18,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675739557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108440106] [2021-07-09 17:30:18,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:18,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:18,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:18,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:18,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:18,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:18,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:18,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:18,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:19,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:19,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:19,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-07-09 17:30:19,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:19,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:19,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:19,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:19,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:19,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:19,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:19,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:19,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:19,221 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:30:19,221 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:19,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:19,222 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:104, output treesize:26 [2021-07-09 17:30:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108440106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:19,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238331053] [2021-07-09 17:30:19,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:19,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:19,256 INFO L87 Difference]: Start difference. First operand 222 states and 659 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,615 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-09 17:30:19,832 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-07-09 17:30:19,978 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-09 17:30:20,174 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-07-09 17:30:20,352 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-07-09 17:30:20,543 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 17:30:20,733 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-07-09 17:30:20,953 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-07-09 17:30:21,131 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-07-09 17:30:21,417 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-07-09 17:30:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:21,458 INFO L93 Difference]: Finished difference Result 337 states and 960 transitions. [2021-07-09 17:30:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:21,459 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:30:21,459 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 17:30:21,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2135.1ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 17:30:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 219. [2021-07-09 17:30:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:30:21,462 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:30:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:21,462 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:30:21,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:30:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:21,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:21,463 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3844,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,677 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 692518350, now seen corresponding path program 100 times [2021-07-09 17:30:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:21,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559264686] [2021-07-09 17:30:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:21,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559264686] [2021-07-09 17:30:21,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559264686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560428517] [2021-07-09 17:30:21,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:21,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:21,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:21,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:21,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:21,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:21,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:21,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:21,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:22,019 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:123 [2021-07-09 17:30:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:22,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:22,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:22,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:22,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:22,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:30:22,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:22,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:22,159 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:22,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:22,164 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:22,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:22,168 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,345 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-09 17:30:22,345 INFO L628 ElimStorePlain]: treesize reduction 183, result has 59.0 percent of original size [2021-07-09 17:30:22,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:22,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:22,353 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:22,357 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:22,362 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:22,374 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:22,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:22,390 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:22,394 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:22,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:22,408 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:22,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:22,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:22,479 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:373, output treesize:164 [2021-07-09 17:30:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:22,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560428517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:22,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:30:22,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181330815] [2021-07-09 17:30:22,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:22,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:22,630 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,138 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-09 17:30:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,180 INFO L93 Difference]: Finished difference Result 259 states and 751 transitions. [2021-07-09 17:30:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:30:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,181 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:30:23,181 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:30:23,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 705.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:30:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-07-09 17:30:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.972972972972973) internal successors, (660), 222 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-07-09 17:30:23,188 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-07-09 17:30:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:23,188 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-07-09 17:30:23,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-07-09 17:30:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:23,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:23,188 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-07-09 17:30:23,401 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2121211076, now seen corresponding path program 101 times [2021-07-09 17:30:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854425102] [2021-07-09 17:30:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:23,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854425102] [2021-07-09 17:30:23,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854425102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969469961] [2021-07-09 17:30:23,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:23,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:23,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:23,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:23,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:23,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:23,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:23,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:23,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:163, output treesize:223 [2021-07-09 17:30:24,021 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_958, array_2, v_prenex_960, v_prenex_962], 1=[v_prenex_959, array_4, v_prenex_961, v_prenex_963]} [2021-07-09 17:30:24,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:24,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:24,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:24,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,253 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-07-09 17:30:24,253 INFO L628 ElimStorePlain]: treesize reduction 212, result has 62.5 percent of original size [2021-07-09 17:30:24,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:24,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:30:24,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:24,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:24,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:24,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:24,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,442 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 17:30:24,443 INFO L628 ElimStorePlain]: treesize reduction 52, result has 83.2 percent of original size [2021-07-09 17:30:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:24,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:24,527 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:24,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:24,610 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:24,614 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:24,701 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:24,707 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:24,712 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:24,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:24,722 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,796 INFO L518 ElimStorePlain]: Eliminatee v_prenex_961 vanished before elimination [2021-07-09 17:30:24,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:24,800 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:24,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:24,804 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:24,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:24,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:24,879 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-07-09 17:30:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969469961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:25,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:30:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288190548] [2021-07-09 17:30:25,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:25,039 INFO L87 Difference]: Start difference. First operand 223 states and 660 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,441 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 17:30:25,628 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-09 17:30:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:25,799 INFO L93 Difference]: Finished difference Result 268 states and 765 transitions. [2021-07-09 17:30:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:25,800 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:30:25,800 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:30:25,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1013.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:30:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 226. [2021-07-09 17:30:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.986666666666667) internal successors, (672), 225 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 672 transitions. [2021-07-09 17:30:25,803 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 672 transitions. Word has length 17 [2021-07-09 17:30:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:25,803 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 672 transitions. [2021-07-09 17:30:25,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 672 transitions. [2021-07-09 17:30:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:25,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:25,804 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:26,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,004 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash 502780204, now seen corresponding path program 102 times [2021-07-09 17:30:26,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:26,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112667559] [2021-07-09 17:30:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:26,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112667559] [2021-07-09 17:30:26,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112667559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573531265] [2021-07-09 17:30:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:26,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:26,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:26,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:26,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:26,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:26,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:26,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:26,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:26,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,497 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-07-09 17:30:26,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:26,498 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-07-09 17:30:26,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:26,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:26,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:26,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,614 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-07-09 17:30:26,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:26,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:26,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:26,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:26,640 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:30:26,640 INFO L518 ElimStorePlain]: Eliminatee v_prenex_967 vanished before elimination [2021-07-09 17:30:26,640 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:30:26,641 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:26,641 INFO L518 ElimStorePlain]: Eliminatee v_prenex_964 vanished before elimination [2021-07-09 17:30:26,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:26,641 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-07-09 17:30:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573531265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:26,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:26,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231728287] [2021-07-09 17:30:26,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:26,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:26,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:26,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:26,673 INFO L87 Difference]: Start difference. First operand 226 states and 672 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:27,381 INFO L93 Difference]: Finished difference Result 268 states and 757 transitions. [2021-07-09 17:30:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:27,382 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:30:27,382 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:30:27,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 807.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:30:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 220. [2021-07-09 17:30:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9726027397260273) internal successors, (651), 219 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 651 transitions. [2021-07-09 17:30:27,385 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 651 transitions. Word has length 17 [2021-07-09 17:30:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:27,385 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 651 transitions. [2021-07-09 17:30:27,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 651 transitions. [2021-07-09 17:30:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:27,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:27,386 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:27,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3893,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:27,586 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1572294666, now seen corresponding path program 103 times [2021-07-09 17:30:27,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:27,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773508970] [2021-07-09 17:30:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:27,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773508970] [2021-07-09 17:30:27,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773508970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142886459] [2021-07-09 17:30:27,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:27,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:27,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:27,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:27,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:27,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:27,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:27,994 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:30:28,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:28,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:28,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:28,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:28,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:28,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:28,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:28,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:30:28,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:28,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:28,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:28,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:28,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:28,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:28,130 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,275 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 17:30:28,275 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-07-09 17:30:28,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:28,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:28,283 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:28,287 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:28,290 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:28,301 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:28,304 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:28,308 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:28,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:28,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:28,320 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:28,323 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:28,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:28,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:28,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:28,398 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:30:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142886459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315345193] [2021-07-09 17:30:28,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:28,540 INFO L87 Difference]: Start difference. First operand 220 states and 651 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,191 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:30:29,474 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:30:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:29,528 INFO L93 Difference]: Finished difference Result 269 states and 773 transitions. [2021-07-09 17:30:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:29,529 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:30:29,529 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:30:29,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1067.3ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:30:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2021-07-09 17:30:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9728506787330318) internal successors, (657), 221 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-07-09 17:30:29,532 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-07-09 17:30:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,532 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-07-09 17:30:29,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-07-09 17:30:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:29,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,532 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3916 [2021-07-09 17:30:29,733 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1907866476, now seen corresponding path program 104 times [2021-07-09 17:30:29,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573677451] [2021-07-09 17:30:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573677451] [2021-07-09 17:30:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573677451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948356776] [2021-07-09 17:30:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:30,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:30,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:30:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:30,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:30,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:30,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:30,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:30,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:30,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:30,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:100 [2021-07-09 17:30:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:30,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:30,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:30,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:30,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:30,259 INFO L628 ElimStorePlain]: treesize reduction 18, result has 80.4 percent of original size [2021-07-09 17:30:30,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:30,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:30,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:30,281 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:30:30,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_970 vanished before elimination [2021-07-09 17:30:30,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:30,284 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:30,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:30,305 INFO L518 ElimStorePlain]: Eliminatee v_prenex_972 vanished before elimination [2021-07-09 17:30:30,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:30,306 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:164, output treesize:52 [2021-07-09 17:30:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948356776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:30,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:30:30,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336279717] [2021-07-09 17:30:30,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:30,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:30,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:30,356 INFO L87 Difference]: Start difference. First operand 222 states and 657 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:30,769 INFO L93 Difference]: Finished difference Result 255 states and 740 transitions. [2021-07-09 17:30:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:30:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:30,770 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:30:30,770 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:30:30,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:30:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2021-07-09 17:30:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9726027397260273) internal successors, (651), 219 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 651 transitions. [2021-07-09 17:30:30,773 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 651 transitions. Word has length 17 [2021-07-09 17:30:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:30,773 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 651 transitions. [2021-07-09 17:30:30,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 651 transitions. [2021-07-09 17:30:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:30,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:30,774 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:30,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3934 [2021-07-09 17:30:30,974 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1365201684, now seen corresponding path program 105 times [2021-07-09 17:30:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:30,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257543383] [2021-07-09 17:30:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:31,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:31,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257543383] [2021-07-09 17:30:31,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257543383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505761901] [2021-07-09 17:30:31,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:31,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:31,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:31,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:31,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:31,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:31,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:31,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:31,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:31,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:31,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:31,375 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:187 [2021-07-09 17:30:31,828 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 85 [2021-07-09 17:30:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:32,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:32,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:32,458 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 106 [2021-07-09 17:30:32,458 INFO L628 ElimStorePlain]: treesize reduction 150, result has 63.7 percent of original size [2021-07-09 17:30:32,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:32,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:32,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:32,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,642 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1000 vanished before elimination [2021-07-09 17:30:32,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:32,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:32,654 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:32,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:32,756 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:32,838 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:30:32,844 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:32,921 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:32,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:32,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:32,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:32,999 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:33,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:33,072 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:33,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_996 vanished before elimination [2021-07-09 17:30:33,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:33,145 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:33,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:33,149 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:33,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:33,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:33,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:30:33,223 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:411, output treesize:62 [2021-07-09 17:30:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:33,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505761901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:33,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:30:33,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714095781] [2021-07-09 17:30:33,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:33,272 INFO L87 Difference]: Start difference. First operand 220 states and 651 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,662 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-07-09 17:30:34,105 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 128 [2021-07-09 17:30:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:34,283 INFO L93 Difference]: Finished difference Result 253 states and 730 transitions. [2021-07-09 17:30:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:34,283 INFO L225 Difference]: With dead ends: 253 [2021-07-09 17:30:34,283 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:30:34,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1199.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:30:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-07-09 17:30:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.9820627802690582) internal successors, (665), 223 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 665 transitions. [2021-07-09 17:30:34,286 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 665 transitions. Word has length 17 [2021-07-09 17:30:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:34,286 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 665 transitions. [2021-07-09 17:30:34,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 665 transitions. [2021-07-09 17:30:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:34,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:34,287 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,487 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash 50467208, now seen corresponding path program 106 times [2021-07-09 17:30:34,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738924714] [2021-07-09 17:30:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:34,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738924714] [2021-07-09 17:30:34,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738924714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278869744] [2021-07-09 17:30:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:34,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:34,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:34,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:34,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:34,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:34,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:34,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:34,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:34,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:34,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:34,955 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:219 [2021-07-09 17:30:35,061 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1001, v_prenex_1003, v_prenex_1005], 1=[array_4, v_prenex_1002, v_prenex_1004, v_prenex_1006]} [2021-07-09 17:30:35,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:30:35,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:35,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:35,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:35,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:30:35,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:35,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:35,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:35,102 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,271 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-07-09 17:30:35,271 INFO L628 ElimStorePlain]: treesize reduction 257, result has 49.2 percent of original size [2021-07-09 17:30:35,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:35,276 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:35,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:35,357 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:35,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:35,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:35,524 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:35,529 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:35,534 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:35,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:35,542 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:35,623 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:35,627 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1004 vanished before elimination [2021-07-09 17:30:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:35,706 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:35,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:35,724 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:35,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:35,798 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-07-09 17:30:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:35,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278869744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:35,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:30:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20620807] [2021-07-09 17:30:35,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:35,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:35,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:35,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:35,973 INFO L87 Difference]: Start difference. First operand 224 states and 665 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,385 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-07-09 17:30:36,592 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-09 17:30:36,822 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 17:30:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:36,864 INFO L93 Difference]: Finished difference Result 276 states and 782 transitions. [2021-07-09 17:30:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:36,865 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:30:36,866 INFO L226 Difference]: Without dead ends: 272 [2021-07-09 17:30:36,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1109.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-07-09 17:30:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2021-07-09 17:30:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.9820627802690582) internal successors, (665), 223 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 665 transitions. [2021-07-09 17:30:36,869 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 665 transitions. Word has length 17 [2021-07-09 17:30:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:36,870 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 665 transitions. [2021-07-09 17:30:36,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 665 transitions. [2021-07-09 17:30:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:36,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:36,870 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:37,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-09 17:30:37,071 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash 592786076, now seen corresponding path program 107 times [2021-07-09 17:30:37,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:37,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119226136] [2021-07-09 17:30:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119226136] [2021-07-09 17:30:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119226136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112399594] [2021-07-09 17:30:37,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:37,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:37,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:37,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:37,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:37,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:37,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:37,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:37,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:37,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:37,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:37,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:37,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-07-09 17:30:37,469 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1010, array_4, v_prenex_1012, v_prenex_1008], 1=[v_prenex_1009, array_2, v_prenex_1011, v_prenex_1007]} [2021-07-09 17:30:37,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:37,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:37,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:37,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,636 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 17:30:37,637 INFO L628 ElimStorePlain]: treesize reduction 82, result has 76.4 percent of original size [2021-07-09 17:30:37,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:30:37,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:37,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:37,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:30:37,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:37,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:37,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:37,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:37,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:37,888 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-09 17:30:37,889 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.2 percent of original size [2021-07-09 17:30:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:37,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:38,028 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-09 17:30:38,028 INFO L628 ElimStorePlain]: treesize reduction 40, result has 85.8 percent of original size [2021-07-09 17:30:38,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:38,032 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:38,035 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:38,109 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:38,112 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:38,116 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:30:38,119 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:38,132 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,191 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1011 vanished before elimination [2021-07-09 17:30:38,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:38,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:38,195 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:38,198 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:38,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:38,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:38,264 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:136 [2021-07-09 17:30:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:38,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112399594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:38,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:30:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485821505] [2021-07-09 17:30:38,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:38,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:38,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:38,404 INFO L87 Difference]: Start difference. First operand 224 states and 665 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,734 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 17:30:39,069 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-09 17:30:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:39,129 INFO L93 Difference]: Finished difference Result 268 states and 768 transitions. [2021-07-09 17:30:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,130 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:30:39,130 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:30:39,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 829.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:30:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 222. [2021-07-09 17:30:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9728506787330318) internal successors, (657), 221 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-07-09 17:30:39,133 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-07-09 17:30:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:39,133 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-07-09 17:30:39,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-07-09 17:30:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:39,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:39,134 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:39,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-07-09 17:30:39,334 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1022618172, now seen corresponding path program 108 times [2021-07-09 17:30:39,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:39,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730641832] [2021-07-09 17:30:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:39,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730641832] [2021-07-09 17:30:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730641832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355627478] [2021-07-09 17:30:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:39,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:39,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:39,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:39,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:39,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:39,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:39,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:39,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:39,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:39,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:39,664 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:30:39,772 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1014, v_prenex_1016, v_prenex_1018], 1=[array_0, v_prenex_1013, v_prenex_1015, v_prenex_1017]} [2021-07-09 17:30:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:30:39,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:39,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:39,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:39,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:30:39,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:39,994 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:30:39,994 INFO L628 ElimStorePlain]: treesize reduction 88, result has 78.4 percent of original size [2021-07-09 17:30:39,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:39,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:40,192 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-07-09 17:30:40,192 INFO L628 ElimStorePlain]: treesize reduction 39, result has 88.2 percent of original size [2021-07-09 17:30:40,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:40,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:40,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:40,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:40,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,448 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 17:30:40,448 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.9 percent of original size [2021-07-09 17:30:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:40,453 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:40,457 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:40,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:40,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:40,480 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:40,560 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:40,563 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:40,642 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:40,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:40,645 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:40,718 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1017 vanished before elimination [2021-07-09 17:30:40,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:40,719 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-07-09 17:30:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355627478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:30:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156909182] [2021-07-09 17:30:40,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:40,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:40,886 INFO L87 Difference]: Start difference. First operand 222 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,225 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 17:30:41,391 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 17:30:41,608 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-09 17:30:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:41,643 INFO L93 Difference]: Finished difference Result 263 states and 754 transitions. [2021-07-09 17:30:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:41,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:41,644 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:30:41,644 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:30:41,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 872.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:30:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-07-09 17:30:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:30:41,647 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:30:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:41,647 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:30:41,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:30:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:41,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:41,648 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:41,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,849 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1599914564, now seen corresponding path program 109 times [2021-07-09 17:30:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:41,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882023462] [2021-07-09 17:30:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:42,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882023462] [2021-07-09 17:30:42,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882023462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768984721] [2021-07-09 17:30:42,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:42,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:42,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:42,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:42,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:42,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:42,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:42,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:213 [2021-07-09 17:30:42,504 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-07-09 17:30:42,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:42,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:42,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:42,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:30:42,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:42,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:42,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:42,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:42,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:42,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:42,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:42,548 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:30:42,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:42,557 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:42,562 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:42,567 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,733 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 17:30:42,734 INFO L628 ElimStorePlain]: treesize reduction 213, result has 55.7 percent of original size [2021-07-09 17:30:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:42,738 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:42,742 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:42,746 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:42,751 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:42,755 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:42,759 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:42,762 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:42,773 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:42,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:42,776 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:42,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:42,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:42,856 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:575, output treesize:169 [2021-07-09 17:30:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768984721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 17:30:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608226346] [2021-07-09 17:30:43,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:43,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:43,028 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,447 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-09 17:30:43,683 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-07-09 17:30:44,012 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-07-09 17:30:44,381 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-07-09 17:30:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,424 INFO L93 Difference]: Finished difference Result 323 states and 924 transitions. [2021-07-09 17:30:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,425 INFO L225 Difference]: With dead ends: 323 [2021-07-09 17:30:44,425 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:30:44,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1638.4ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:30:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 226. [2021-07-09 17:30:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.0044444444444443) internal successors, (676), 225 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-07-09 17:30:44,428 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-07-09 17:30:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,428 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-07-09 17:30:44,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-07-09 17:30:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:44,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,429 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4091 [2021-07-09 17:30:44,630 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1024076716, now seen corresponding path program 110 times [2021-07-09 17:30:44,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082008793] [2021-07-09 17:30:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082008793] [2021-07-09 17:30:44,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082008793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042700052] [2021-07-09 17:30:44,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:44,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:44,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:44,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:44,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:44,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:44,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:44,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:44,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:44,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:44,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:44,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-07-09 17:30:45,342 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1022, v_prenex_1025, v_prenex_1027, v_prenex_1029], 1=[v_prenex_1030, array_4, v_prenex_1023, v_prenex_1026, v_prenex_1028]} [2021-07-09 17:30:45,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:45,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:45,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:45,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,457 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-07-09 17:30:45,457 INFO L628 ElimStorePlain]: treesize reduction 157, result has 48.5 percent of original size [2021-07-09 17:30:45,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:45,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:45,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:45,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:45,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:45,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:45,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:45,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:45,667 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:45,670 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1023 vanished before elimination [2021-07-09 17:30:45,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1026 vanished before elimination [2021-07-09 17:30:45,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:45,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:45,715 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:45,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:45,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:45,750 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:303, output treesize:52 [2021-07-09 17:30:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042700052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:30:45,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550547429] [2021-07-09 17:30:45,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:45,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:45,795 INFO L87 Difference]: Start difference. First operand 226 states and 676 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,149 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-07-09 17:30:46,366 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-09 17:30:46,571 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-09 17:30:46,805 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2021-07-09 17:30:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,888 INFO L93 Difference]: Finished difference Result 320 states and 919 transitions. [2021-07-09 17:30:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:46,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,889 INFO L225 Difference]: With dead ends: 320 [2021-07-09 17:30:46,889 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:30:46,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1272.9ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:30:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 221. [2021-07-09 17:30:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9727272727272727) internal successors, (654), 220 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-07-09 17:30:46,892 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-07-09 17:30:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:46,892 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-07-09 17:30:46,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-07-09 17:30:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:46,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:46,893 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:47,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,093 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash -324965886, now seen corresponding path program 111 times [2021-07-09 17:30:47,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:47,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393678207] [2021-07-09 17:30:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:47,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393678207] [2021-07-09 17:30:47,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393678207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634683005] [2021-07-09 17:30:47,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:47,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:47,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:47,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:47,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:47,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:47,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:47,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:47,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:47,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:47,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:47,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:203, output treesize:193 [2021-07-09 17:30:47,964 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-07-09 17:30:48,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:48,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:48,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,613 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-07-09 17:30:48,614 INFO L628 ElimStorePlain]: treesize reduction 170, result has 63.1 percent of original size [2021-07-09 17:30:48,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:48,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:48,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:48,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:48,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:30:48,819 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:48,918 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:48,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:48,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:30:48,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:49,019 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:49,113 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,202 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:49,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:49,209 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:49,215 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:49,315 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:49,320 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:49,399 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:49,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:49,404 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:49,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:49,475 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1049 vanished before elimination [2021-07-09 17:30:49,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:30:49,479 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:475, output treesize:82 [2021-07-09 17:30:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634683005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:49,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:30:49,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86207287] [2021-07-09 17:30:49,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:30:49,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:49,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:30:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:30:49,540 INFO L87 Difference]: Start difference. First operand 221 states and 654 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,002 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2021-07-09 17:30:50,450 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 139 [2021-07-09 17:30:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:50,603 INFO L93 Difference]: Finished difference Result 266 states and 769 transitions. [2021-07-09 17:30:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:50,604 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:30:50,604 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:30:50,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1259.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:30:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2021-07-09 17:30:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.982142857142857) internal successors, (668), 224 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-07-09 17:30:50,607 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 17 [2021-07-09 17:30:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:50,607 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-07-09 17:30:50,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-07-09 17:30:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:50,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:50,608 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:50,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-09 17:30:50,814 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1090703006, now seen corresponding path program 112 times [2021-07-09 17:30:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:50,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92416052] [2021-07-09 17:30:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92416052] [2021-07-09 17:30:51,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92416052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759756327] [2021-07-09 17:30:51,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:51,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:51,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:51,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:51,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:51,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:51,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:51,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:51,287 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-07-09 17:30:51,390 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1055, v_prenex_1057, v_prenex_1059], 1=[v_prenex_1060, array_4, v_prenex_1056, v_prenex_1058]} [2021-07-09 17:30:51,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:51,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:51,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,580 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 17:30:51,581 INFO L628 ElimStorePlain]: treesize reduction 191, result has 62.3 percent of original size [2021-07-09 17:30:51,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:51,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:51,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:51,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:51,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:51,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:51,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:51,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:51,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:51,789 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:30:51,793 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:51,798 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,941 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 17:30:51,941 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.3 percent of original size [2021-07-09 17:30:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:51,946 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:51,950 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:51,954 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:51,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:51,958 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:51,962 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,026 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:52,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:52,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:52,033 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:52,103 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:52,107 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:52,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:52,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:52,174 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:30:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759756327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:52,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911446101] [2021-07-09 17:30:52,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:52,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:52,335 INFO L87 Difference]: Start difference. First operand 225 states and 668 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,858 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-09 17:30:53,067 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-07-09 17:30:53,247 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-07-09 17:30:53,461 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-07-09 17:30:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,538 INFO L93 Difference]: Finished difference Result 288 states and 822 transitions. [2021-07-09 17:30:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,539 INFO L225 Difference]: With dead ends: 288 [2021-07-09 17:30:53,539 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:30:53,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1362.0ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:30:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 223. [2021-07-09 17:30:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.972972972972973) internal successors, (660), 222 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-07-09 17:30:53,542 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-07-09 17:30:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,542 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-07-09 17:30:53,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-07-09 17:30:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:53,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,543 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4208,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,743 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash 17617626, now seen corresponding path program 113 times [2021-07-09 17:30:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118725986] [2021-07-09 17:30:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118725986] [2021-07-09 17:30:53,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118725986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877522975] [2021-07-09 17:30:53,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:54,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:54,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:54,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:54,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:54,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:30:54,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:156, output treesize:146 [2021-07-09 17:30:54,271 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 36=[array_0]} [2021-07-09 17:30:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:54,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:30:54,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:54,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:54,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:54,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:30:54,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:54,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:54,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:54,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:54,319 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:54,332 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:54,340 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:54,346 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,614 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 84 [2021-07-09 17:30:54,615 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.0 percent of original size [2021-07-09 17:30:54,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-07-09 17:30:54,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:54,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:54,643 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:54,648 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:54,654 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:54,668 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:30:54,673 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:54,687 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:54,692 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:54,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:54,697 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:54,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,814 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 17:30:54,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:30:54,818 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 10 variables, input treesize:525, output treesize:233 [2021-07-09 17:30:54,967 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-09 17:30:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877522975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:30:55,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745973107] [2021-07-09 17:30:55,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:30:55,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:30:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:30:55,061 INFO L87 Difference]: Start difference. First operand 223 states and 660 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,656 INFO L93 Difference]: Finished difference Result 269 states and 782 transitions. [2021-07-09 17:30:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,657 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:30:55,657 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:30:55,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:30:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 219. [2021-07-09 17:30:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:30:55,660 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:30:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,660 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:30:55,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:30:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:55,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,660 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:55,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,869 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:55,869 INFO L82 PathProgramCache]: Analyzing trace with hash -574938828, now seen corresponding path program 114 times [2021-07-09 17:30:55,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:55,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117106508] [2021-07-09 17:30:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117106508] [2021-07-09 17:30:56,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117106508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90523394] [2021-07-09 17:30:56,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:30:56,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:56,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:56,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:56,272 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:30:56,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:56,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,308 INFO L628 ElimStorePlain]: treesize reduction 25, result has 66.2 percent of original size [2021-07-09 17:30:56,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:30:56,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:131, output treesize:49 [2021-07-09 17:30:56,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:56,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:56,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:56,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1070 vanished before elimination [2021-07-09 17:30:56,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:56,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:56,396 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:30:56,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:30:56,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:56,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:56,408 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1072 vanished before elimination [2021-07-09 17:30:56,408 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:56,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:56,408 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:102, output treesize:26 [2021-07-09 17:30:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90523394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:56,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883922919] [2021-07-09 17:30:56,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:56,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:56,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:56,436 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,923 INFO L93 Difference]: Finished difference Result 265 states and 766 transitions. [2021-07-09 17:30:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:30:56,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,924 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:30:56,924 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:30:56,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:30:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2021-07-09 17:30:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9728506787330318) internal successors, (657), 221 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-07-09 17:30:56,927 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-07-09 17:30:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,927 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-07-09 17:30:56,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-07-09 17:30:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:56,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,927 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4261 [2021-07-09 17:30:57,128 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash 906299042, now seen corresponding path program 115 times [2021-07-09 17:30:57,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311271962] [2021-07-09 17:30:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311271962] [2021-07-09 17:30:57,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311271962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650535646] [2021-07-09 17:30:57,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:57,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:57,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:30:57,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:30:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:57,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:57,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:57,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:30:57,534 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:171, output treesize:231 [2021-07-09 17:30:57,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:57,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:57,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:57,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:57,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:57,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:57,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:57,710 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:57,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:57,721 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:57,727 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:30:57,733 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:30:57,739 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:30:57,744 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:57,749 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,944 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-09 17:30:57,944 INFO L628 ElimStorePlain]: treesize reduction 228, result has 56.2 percent of original size [2021-07-09 17:30:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:57,949 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:30:57,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:30:57,958 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:57,969 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:30:57,973 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:57,978 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:57,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:30:57,990 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:30:57,994 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:57,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:30:57,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:30:57,998 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:58,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:58,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:30:58,073 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:617, output treesize:169 [2021-07-09 17:30:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650535646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 17:30:58,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783921183] [2021-07-09 17:30:58,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:30:58,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:30:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:30:58,232 INFO L87 Difference]: Start difference. First operand 222 states and 657 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,566 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 17:30:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,716 INFO L93 Difference]: Finished difference Result 269 states and 768 transitions. [2021-07-09 17:30:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:30:58,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:30:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,717 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:30:58,717 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:30:58,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:30:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-07-09 17:30:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.986607142857143) internal successors, (669), 224 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 669 transitions. [2021-07-09 17:30:58,720 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 669 transitions. Word has length 17 [2021-07-09 17:30:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,720 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 669 transitions. [2021-07-09 17:30:58,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 669 transitions. [2021-07-09 17:30:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:30:58,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,720 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4283 [2021-07-09 17:30:58,921 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash -764676974, now seen corresponding path program 116 times [2021-07-09 17:30:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402427442] [2021-07-09 17:30:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402427442] [2021-07-09 17:30:59,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402427442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194588365] [2021-07-09 17:30:59,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:59,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:59,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:59,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:30:59,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:59,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:59,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:30:59,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:59,315 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:30:59,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,372 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-07-09 17:30:59,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:59,373 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-07-09 17:30:59,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:30:59,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:59,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:30:59,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,485 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-07-09 17:30:59,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1074 vanished before elimination [2021-07-09 17:30:59,486 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:30:59,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:30:59,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:30:59,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:30:59,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:59,512 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:30:59,512 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1076 vanished before elimination [2021-07-09 17:30:59,512 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:30:59,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:30:59,513 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-07-09 17:30:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194588365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:59,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:30:59,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080817943] [2021-07-09 17:30:59,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:30:59,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:30:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:30:59,544 INFO L87 Difference]: Start difference. First operand 225 states and 669 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,259 INFO L93 Difference]: Finished difference Result 269 states and 760 transitions. [2021-07-09 17:31:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:00,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,260 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:31:00,260 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:31:00,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 744.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:31:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 219. [2021-07-09 17:31:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:31:00,263 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:31:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,263 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:31:00,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:31:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:00,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,264 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4301,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,464 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1455215452, now seen corresponding path program 117 times [2021-07-09 17:31:00,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517804445] [2021-07-09 17:31:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517804445] [2021-07-09 17:31:00,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517804445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834881184] [2021-07-09 17:31:00,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:00,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:00,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:00,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:00,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:00,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:00,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:00,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:00,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:00,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:195, output treesize:251 [2021-07-09 17:31:01,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:01,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:01,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:01,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:01,187 INFO L628 ElimStorePlain]: treesize reduction 30, result has 72.2 percent of original size [2021-07-09 17:31:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:01,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,208 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:31:01,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:01,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:01,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:01,230 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1078 vanished before elimination [2021-07-09 17:31:01,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1080 vanished before elimination [2021-07-09 17:31:01,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:01,231 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:228, output treesize:52 [2021-07-09 17:31:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834881184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:31:01,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364895917] [2021-07-09 17:31:01,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:01,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:01,274 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,690 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-07-09 17:31:01,919 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 17:31:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,013 INFO L93 Difference]: Finished difference Result 259 states and 751 transitions. [2021-07-09 17:31:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,014 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:31:02,014 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:31:02,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 985.7ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:31:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2021-07-09 17:31:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9727272727272727) internal successors, (654), 220 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-07-09 17:31:02,017 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-07-09 17:31:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,017 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-07-09 17:31:02,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-07-09 17:31:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:02,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,017 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4324,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,218 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash 640409298, now seen corresponding path program 118 times [2021-07-09 17:31:02,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912762426] [2021-07-09 17:31:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912762426] [2021-07-09 17:31:02,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912762426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852491476] [2021-07-09 17:31:02,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:31:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:02,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:02,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:02,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:02,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:02,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:02,670 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:156, output treesize:146 [2021-07-09 17:31:02,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:02,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:02,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:02,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:02,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:02,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:02,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:02,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:02,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:02,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:02,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:02,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:02,789 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:02,793 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:02,798 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,957 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-07-09 17:31:02,957 INFO L628 ElimStorePlain]: treesize reduction 363, result has 38.3 percent of original size [2021-07-09 17:31:02,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:02,961 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:02,965 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:02,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:02,978 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:02,981 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:02,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:02,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:02,991 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:02,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:02,994 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:03,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:03,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:31:03,053 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:425, output treesize:146 [2021-07-09 17:31:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852491476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:31:03,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103705114] [2021-07-09 17:31:03,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:03,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:03,221 INFO L87 Difference]: Start difference. First operand 221 states and 654 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,661 INFO L93 Difference]: Finished difference Result 256 states and 743 transitions. [2021-07-09 17:31:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:31:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,661 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:31:03,661 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:31:03,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:31:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-07-09 17:31:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:31:03,664 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:31:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,664 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:31:03,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:31:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:03,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,665 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4343 [2021-07-09 17:31:03,865 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1662308434, now seen corresponding path program 119 times [2021-07-09 17:31:03,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950987927] [2021-07-09 17:31:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950987927] [2021-07-09 17:31:04,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950987927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532290614] [2021-07-09 17:31:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:04,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:31:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:04,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:04,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:04,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:04,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:04,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:04,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:04,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:04,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:04,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:201, output treesize:261 [2021-07-09 17:31:04,620 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1093, v_prenex_1095, v_prenex_1083, array_2, v_prenex_1085, v_prenex_1087, v_prenex_1089, v_prenex_1091], 1=[v_prenex_1092, v_prenex_1084, v_prenex_1094, v_prenex_1086, v_prenex_1096, v_prenex_1088, array_4, v_prenex_1090]} [2021-07-09 17:31:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:04,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:04,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:04,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:04,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-07-09 17:31:04,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:04,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:04,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:04,962 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 94 [2021-07-09 17:31:04,962 INFO L628 ElimStorePlain]: treesize reduction 562, result has 43.2 percent of original size [2021-07-09 17:31:04,963 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1095 vanished before elimination [2021-07-09 17:31:04,963 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1083 vanished before elimination [2021-07-09 17:31:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:04,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:04,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:04,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,157 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-07-09 17:31:05,158 INFO L628 ElimStorePlain]: treesize reduction 120, result has 70.9 percent of original size [2021-07-09 17:31:05,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:05,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:05,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,325 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 17:31:05,326 INFO L628 ElimStorePlain]: treesize reduction 6, result has 97.8 percent of original size [2021-07-09 17:31:05,326 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1087 vanished before elimination [2021-07-09 17:31:05,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:05,330 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:05,486 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-09 17:31:05,486 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.8 percent of original size [2021-07-09 17:31:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:05,491 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:05,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:05,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:05,572 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:05,576 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,661 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1084 vanished before elimination [2021-07-09 17:31:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:05,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:05,665 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:05,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:05,669 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:05,673 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1086 vanished before elimination [2021-07-09 17:31:05,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1096 vanished before elimination [2021-07-09 17:31:05,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1088 vanished before elimination [2021-07-09 17:31:05,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:05,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:05,752 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:05,755 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:05,829 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:05,832 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:31:05,907 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 16 variables, input treesize:817, output treesize:168 [2021-07-09 17:31:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532290614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:31:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978280848] [2021-07-09 17:31:06,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:06,099 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,478 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 17:31:06,854 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-07-09 17:31:07,194 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:31:07,386 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:31:07,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,481 INFO L93 Difference]: Finished difference Result 281 states and 802 transitions. [2021-07-09 17:31:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:07,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,482 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:31:07,482 INFO L226 Difference]: Without dead ends: 269 [2021-07-09 17:31:07,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1692.9ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-09 17:31:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2021-07-09 17:31:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9727272727272727) internal successors, (654), 220 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-07-09 17:31:07,485 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-07-09 17:31:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:07,485 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-07-09 17:31:07,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-07-09 17:31:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:07,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:07,486 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4363 [2021-07-09 17:31:07,686 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2004891946, now seen corresponding path program 120 times [2021-07-09 17:31:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306798982] [2021-07-09 17:31:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306798982] [2021-07-09 17:31:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306798982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269923062] [2021-07-09 17:31:07,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:07,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:07,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:07,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:07,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:07,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:07,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:07,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:07,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:07,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:07,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:07,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:113 [2021-07-09 17:31:08,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:08,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:08,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:08,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:08,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:08,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:08,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:08,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:08,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:08,052 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:08,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:08,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:08,061 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:08,065 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,190 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-07-09 17:31:08,190 INFO L628 ElimStorePlain]: treesize reduction 236, result has 45.7 percent of original size [2021-07-09 17:31:08,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:08,194 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:08,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:08,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:08,208 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:08,211 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:08,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:31:08,221 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:08,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:08,225 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:08,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:08,234 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:08,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:31:08,283 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:397, output treesize:125 [2021-07-09 17:31:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269923062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 17:31:08,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020160386] [2021-07-09 17:31:08,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:08,404 INFO L87 Difference]: Start difference. First operand 221 states and 654 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,839 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:31:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,907 INFO L93 Difference]: Finished difference Result 256 states and 743 transitions. [2021-07-09 17:31:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:31:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,908 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:31:08,908 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:31:08,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:31:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-07-09 17:31:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:31:08,911 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:31:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,911 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:31:08,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:31:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:08,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,912 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-07-09 17:31:09,121 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 569417172, now seen corresponding path program 121 times [2021-07-09 17:31:09,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240764375] [2021-07-09 17:31:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240764375] [2021-07-09 17:31:09,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240764375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330295500] [2021-07-09 17:31:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:09,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:09,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:09,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:09,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:09,482 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-07-09 17:31:09,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:09,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:09,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:09,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:09,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:09,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:09,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:09,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 17:31:09,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:09,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:09,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:09,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:09,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,757 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-07-09 17:31:09,757 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-07-09 17:31:09,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:09,761 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:09,765 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:09,769 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:09,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:09,783 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:09,786 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:09,790 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:09,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:09,803 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:09,806 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:09,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:09,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:09,871 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-07-09 17:31:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330295500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:31:09,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911941010] [2021-07-09 17:31:09,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:09,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:09,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:09,996 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,591 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-07-09 17:31:10,764 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:31:11,019 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 17:31:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,061 INFO L93 Difference]: Finished difference Result 288 states and 828 transitions. [2021-07-09 17:31:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:11,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,062 INFO L225 Difference]: With dead ends: 288 [2021-07-09 17:31:11,062 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:31:11,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:31:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 223. [2021-07-09 17:31:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.972972972972973) internal successors, (660), 222 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-07-09 17:31:11,065 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-07-09 17:31:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,065 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-07-09 17:31:11,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-07-09 17:31:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:11,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,065 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4417,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,266 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,266 INFO L82 PathProgramCache]: Analyzing trace with hash -245388982, now seen corresponding path program 122 times [2021-07-09 17:31:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158708650] [2021-07-09 17:31:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158708650] [2021-07-09 17:31:11,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158708650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362639693] [2021-07-09 17:31:11,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:11,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:11,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:11,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:11,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:11,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:11,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:11,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:11,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:11,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:123 [2021-07-09 17:31:11,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:11,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:11,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:11,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:11,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:11,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:11,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:11,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:11,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:11,851 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:12,049 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-09 17:31:12,049 INFO L628 ElimStorePlain]: treesize reduction 43, result has 87.0 percent of original size [2021-07-09 17:31:12,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:31:12,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:12,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:12,081 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:12,094 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:12,098 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:12,110 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:31:12,115 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:12,120 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:31:12,131 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:12,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:12,226 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:333, output treesize:152 [2021-07-09 17:31:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362639693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 17:31:12,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459558004] [2021-07-09 17:31:12,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:31:12,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:31:12,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:31:12,409 INFO L87 Difference]: Start difference. First operand 223 states and 660 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,904 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:31:13,071 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-09 17:31:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,129 INFO L93 Difference]: Finished difference Result 274 states and 795 transitions. [2021-07-09 17:31:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,130 INFO L225 Difference]: With dead ends: 274 [2021-07-09 17:31:13,130 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:31:13,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 930.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:31:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 221. [2021-07-09 17:31:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9727272727272727) internal successors, (654), 220 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-07-09 17:31:13,133 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-07-09 17:31:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:13,133 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-07-09 17:31:13,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-07-09 17:31:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:13,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:13,134 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,334 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash 344982116, now seen corresponding path program 123 times [2021-07-09 17:31:13,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074482806] [2021-07-09 17:31:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074482806] [2021-07-09 17:31:13,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074482806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496396693] [2021-07-09 17:31:13,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:13,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:13,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:13,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:13,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:13,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:13,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:13,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:87, output treesize:59 [2021-07-09 17:31:13,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:13,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:13,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:13,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:13,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:13,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:13,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:13,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:13,687 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:13,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:13,691 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:13,694 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,802 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-09 17:31:13,803 INFO L628 ElimStorePlain]: treesize reduction 58, result has 75.9 percent of original size [2021-07-09 17:31:13,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:31:13,806 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:13,809 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:13,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:13,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:13,823 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:13,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:13,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:13,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:13,836 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:13,838 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:13,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:13,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:13,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:31:13,893 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:269, output treesize:115 [2021-07-09 17:31:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496396693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:31:14,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506912990] [2021-07-09 17:31:14,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:14,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:14,013 INFO L87 Difference]: Start difference. First operand 221 states and 654 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,619 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-07-09 17:31:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:14,701 INFO L93 Difference]: Finished difference Result 308 states and 888 transitions. [2021-07-09 17:31:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:14,702 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:31:14,702 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:31:14,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:31:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 219. [2021-07-09 17:31:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-07-09 17:31:14,705 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-07-09 17:31:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,705 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-07-09 17:31:14,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-07-09 17:31:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:14,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,705 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:14,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4462 [2021-07-09 17:31:14,906 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:14,906 INFO L82 PathProgramCache]: Analyzing trace with hash -109288126, now seen corresponding path program 124 times [2021-07-09 17:31:14,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:14,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171445989] [2021-07-09 17:31:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171445989] [2021-07-09 17:31:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171445989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695503089] [2021-07-09 17:31:15,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:15,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:15,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:15,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:15,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:15,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:15,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:15,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:15,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:15,351 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-07-09 17:31:15,455 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1100, v_prenex_1102, v_prenex_1104], 1=[array_4, v_prenex_1101, v_prenex_1103, v_prenex_1105]} [2021-07-09 17:31:15,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:15,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:15,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,651 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 17:31:15,651 INFO L628 ElimStorePlain]: treesize reduction 191, result has 62.3 percent of original size [2021-07-09 17:31:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:15,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:15,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:15,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:15,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:15,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:15,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:15,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:15,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:15,849 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:15,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:31:15,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:15,861 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:15,999 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 17:31:16,000 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.3 percent of original size [2021-07-09 17:31:16,000 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:31:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:16,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:16,004 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:16,007 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:16,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:16,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:16,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:16,081 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:16,084 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:16,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:16,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:16,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:16,157 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:16,161 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:16,164 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:16,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:16,168 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:16,171 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:16,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:16,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:31:16,229 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:31:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695503089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:31:16,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177609517] [2021-07-09 17:31:16,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:16,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:16,371 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,933 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2021-07-09 17:31:17,189 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-07-09 17:31:17,367 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 17:31:17,571 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-07-09 17:31:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,665 INFO L93 Difference]: Finished difference Result 302 states and 863 transitions. [2021-07-09 17:31:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,666 INFO L225 Difference]: With dead ends: 302 [2021-07-09 17:31:17,666 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:31:17,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1379.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:31:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 224. [2021-07-09 17:31:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.9730941704035874) internal successors, (663), 223 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 663 transitions. [2021-07-09 17:31:17,669 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 663 transitions. Word has length 17 [2021-07-09 17:31:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,669 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 663 transitions. [2021-07-09 17:31:17,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 663 transitions. [2021-07-09 17:31:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:17,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,670 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4476,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,870 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,871 INFO L82 PathProgramCache]: Analyzing trace with hash 233295386, now seen corresponding path program 125 times [2021-07-09 17:31:17,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165514947] [2021-07-09 17:31:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165514947] [2021-07-09 17:31:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165514947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63771951] [2021-07-09 17:31:17,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:18,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:18,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:18,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:18,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:18,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:18,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:18,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:18,174 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:31:18,313 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1109, v_prenex_1119, array_2, v_prenex_1111, v_prenex_1113, v_prenex_1115, v_prenex_1107, v_prenex_1117], 1=[v_prenex_1108, array_0, v_prenex_1110, v_prenex_1112, v_prenex_1114, v_prenex_1116, v_prenex_1118, v_prenex_1106]} [2021-07-09 17:31:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:18,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:18,530 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2021-07-09 17:31:18,531 INFO L628 ElimStorePlain]: treesize reduction 160, result has 64.8 percent of original size [2021-07-09 17:31:18,531 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1119 vanished before elimination [2021-07-09 17:31:18,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:18,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:31:18,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:18,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:18,822 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-07-09 17:31:18,823 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.8 percent of original size [2021-07-09 17:31:18,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:18,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:18,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:18,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:18,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:18,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,078 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-09 17:31:19,078 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.8 percent of original size [2021-07-09 17:31:19,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:19,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:19,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1117 vanished before elimination [2021-07-09 17:31:19,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:19,175 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:19,180 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,262 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:31:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:19,267 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:19,272 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:19,275 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:19,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:19,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,435 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1114 vanished before elimination [2021-07-09 17:31:19,435 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1116 vanished before elimination [2021-07-09 17:31:19,435 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1118 vanished before elimination [2021-07-09 17:31:19,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:19,439 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:19,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:19,442 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:19,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:19,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:19,517 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 16 variables, input treesize:374, output treesize:161 [2021-07-09 17:31:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63771951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:31:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427637233] [2021-07-09 17:31:19,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:19,687 INFO L87 Difference]: Start difference. First operand 224 states and 663 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,157 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-07-09 17:31:20,331 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 17:31:20,640 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:31:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,678 INFO L93 Difference]: Finished difference Result 285 states and 824 transitions. [2021-07-09 17:31:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,679 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:31:20,679 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:31:20,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1058.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:31:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 224. [2021-07-09 17:31:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.9730941704035874) internal successors, (663), 223 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 663 transitions. [2021-07-09 17:31:20,682 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 663 transitions. Word has length 17 [2021-07-09 17:31:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,682 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 663 transitions. [2021-07-09 17:31:20,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 663 transitions. [2021-07-09 17:31:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:20,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,682 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-07-09 17:31:20,882 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1313469832, now seen corresponding path program 126 times [2021-07-09 17:31:20,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280173209] [2021-07-09 17:31:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280173209] [2021-07-09 17:31:21,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280173209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889146068] [2021-07-09 17:31:21,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:31:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:21,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:21,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:21,276 INFO L628 ElimStorePlain]: treesize reduction 52, result has 61.5 percent of original size [2021-07-09 17:31:21,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:21,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,303 INFO L628 ElimStorePlain]: treesize reduction 26, result has 65.8 percent of original size [2021-07-09 17:31:21,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:31:21,304 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:131, output treesize:50 [2021-07-09 17:31:21,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:21,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:21,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:21,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:31:21,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,383 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:31:21,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:21,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:21,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,405 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 17:31:21,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1122 vanished before elimination [2021-07-09 17:31:21,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1124 vanished before elimination [2021-07-09 17:31:21,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:31:21,406 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:104, output treesize:26 [2021-07-09 17:31:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889146068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:31:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318454948] [2021-07-09 17:31:21,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:21,439 INFO L87 Difference]: Start difference. First operand 224 states and 663 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,305 INFO L93 Difference]: Finished difference Result 332 states and 941 transitions. [2021-07-09 17:31:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,306 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:31:22,306 INFO L226 Difference]: Without dead ends: 324 [2021-07-09 17:31:22,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-09 17:31:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 226. [2021-07-09 17:31:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.986666666666667) internal successors, (672), 225 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 672 transitions. [2021-07-09 17:31:22,309 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 672 transitions. Word has length 17 [2021-07-09 17:31:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,310 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 672 transitions. [2021-07-09 17:31:22,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 672 transitions. [2021-07-09 17:31:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:22,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,310 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:22,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,511 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1873488734, now seen corresponding path program 127 times [2021-07-09 17:31:22,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:22,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758719682] [2021-07-09 17:31:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758719682] [2021-07-09 17:31:22,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758719682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557175704] [2021-07-09 17:31:22,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:22,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:22,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:22,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:22,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:22,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:22,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:22,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:22,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:22,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:22,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:22,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-07-09 17:31:22,935 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1130, array_2, v_prenex_1126, v_prenex_1128], 1=[array_0, v_prenex_1125, v_prenex_1127, v_prenex_1129]} [2021-07-09 17:31:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:22,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:22,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:22,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,139 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-07-09 17:31:23,139 INFO L628 ElimStorePlain]: treesize reduction 159, result has 64.5 percent of original size [2021-07-09 17:31:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:23,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:23,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:31:23,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:23,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:23,326 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-07-09 17:31:23,327 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.7 percent of original size [2021-07-09 17:31:23,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:23,331 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:23,335 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:23,422 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,573 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 17:31:23,574 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.9 percent of original size [2021-07-09 17:31:23,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:23,578 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:23,583 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:23,597 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:23,601 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:23,605 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:23,679 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:23,682 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,757 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1127 vanished before elimination [2021-07-09 17:31:23,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:23,761 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:23,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:23,765 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:23,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:23,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:23,836 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-07-09 17:31:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557175704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:24,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:31:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89183409] [2021-07-09 17:31:24,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:24,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:24,002 INFO L87 Difference]: Start difference. First operand 226 states and 672 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,488 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-09 17:31:24,752 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-07-09 17:31:25,046 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-07-09 17:31:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,089 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-07-09 17:31:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,090 INFO L225 Difference]: With dead ends: 328 [2021-07-09 17:31:25,090 INFO L226 Difference]: Without dead ends: 320 [2021-07-09 17:31:25,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1156.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-09 17:31:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 225. [2021-07-09 17:31:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9910714285714284) internal successors, (670), 224 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 670 transitions. [2021-07-09 17:31:25,093 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 670 transitions. Word has length 17 [2021-07-09 17:31:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,093 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 670 transitions. [2021-07-09 17:31:25,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 670 transitions. [2021-07-09 17:31:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:25,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,094 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4549,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,294 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash -684833076, now seen corresponding path program 128 times [2021-07-09 17:31:25,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041993186] [2021-07-09 17:31:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041993186] [2021-07-09 17:31:25,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041993186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868783792] [2021-07-09 17:31:25,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:25,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:25,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:25,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:25,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:25,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:25,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:25,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:25,721 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-07-09 17:31:25,887 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-07-09 17:31:25,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:25,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:25,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:25,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:25,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:25,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:25,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:25,911 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:25,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:31:25,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:25,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:25,927 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:25,931 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:25,935 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:25,940 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:25,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:31:25,944 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,088 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-09 17:31:26,089 INFO L628 ElimStorePlain]: treesize reduction 187, result has 56.0 percent of original size [2021-07-09 17:31:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:26,093 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:26,097 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:26,100 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:26,104 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:26,107 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:26,118 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:26,121 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:26,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:26,125 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:26,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:26,134 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:26,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:31:26,192 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:521, output treesize:139 [2021-07-09 17:31:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868783792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:31:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027784925] [2021-07-09 17:31:26,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:26,341 INFO L87 Difference]: Start difference. First operand 225 states and 670 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,770 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-07-09 17:31:27,077 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2021-07-09 17:31:27,560 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2021-07-09 17:31:28,066 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2021-07-09 17:31:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,112 INFO L93 Difference]: Finished difference Result 375 states and 1083 transitions. [2021-07-09 17:31:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,113 INFO L225 Difference]: With dead ends: 375 [2021-07-09 17:31:28,113 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:31:28,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1968.5ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:31:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 229. [2021-07-09 17:31:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.991228070175439) internal successors, (682), 228 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-07-09 17:31:28,117 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 17 [2021-07-09 17:31:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,117 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-07-09 17:31:28,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-07-09 17:31:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:28,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,118 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4575,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,329 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash 590115602, now seen corresponding path program 129 times [2021-07-09 17:31:28,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470854021] [2021-07-09 17:31:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470854021] [2021-07-09 17:31:28,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470854021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737351964] [2021-07-09 17:31:28,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:28,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:28,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:28,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:28,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:28,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:28,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:28,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:28,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:28,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:187 [2021-07-09 17:31:29,139 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1141, array_2, v_prenex_1143, v_prenex_1145, v_prenex_1136, v_prenex_1138], 1=[array_4, v_prenex_1142, v_prenex_1144, v_prenex_1146, v_prenex_1137, v_prenex_1139]} [2021-07-09 17:31:29,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:29,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:29,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,374 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2021-07-09 17:31:29,374 INFO L628 ElimStorePlain]: treesize reduction 136, result has 61.7 percent of original size [2021-07-09 17:31:29,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:29,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:29,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:29,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:29,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:29,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:31:29,617 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:29,621 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:29,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:31:29,681 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1142 vanished before elimination [2021-07-09 17:31:29,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:29,734 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,781 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1146 vanished before elimination [2021-07-09 17:31:29,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:29,786 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:29,790 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:29,848 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:29,852 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:29,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:29,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:31:29,900 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:369, output treesize:62 [2021-07-09 17:31:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737351964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:31:29,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387643155] [2021-07-09 17:31:29,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:29,946 INFO L87 Difference]: Start difference. First operand 229 states and 682 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,319 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-07-09 17:31:30,646 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 124 [2021-07-09 17:31:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,794 INFO L93 Difference]: Finished difference Result 321 states and 933 transitions. [2021-07-09 17:31:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:30,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,795 INFO L225 Difference]: With dead ends: 321 [2021-07-09 17:31:30,795 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:31:30,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:31:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 233. [2021-07-09 17:31:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.0) internal successors, (696), 232 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 696 transitions. [2021-07-09 17:31:30,798 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 696 transitions. Word has length 17 [2021-07-09 17:31:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,798 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 696 transitions. [2021-07-09 17:31:30,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 696 transitions. [2021-07-09 17:31:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:30,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,798 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-07-09 17:31:30,999 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2005784494, now seen corresponding path program 130 times [2021-07-09 17:31:30,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995202086] [2021-07-09 17:31:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995202086] [2021-07-09 17:31:31,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995202086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002144740] [2021-07-09 17:31:31,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:31,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:31,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:31,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:31,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:31,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:31,404 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:219 [2021-07-09 17:31:31,513 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1150, v_prenex_1152, array_2, v_prenex_1148], 1=[v_prenex_1151, array_4, v_prenex_1153, v_prenex_1149]} [2021-07-09 17:31:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:31,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:31,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,727 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-09 17:31:31,728 INFO L628 ElimStorePlain]: treesize reduction 186, result has 64.4 percent of original size [2021-07-09 17:31:31,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:31,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:31,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:31,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:31,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:31:31,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:31,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:31,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:31,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:31,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:31,999 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-09 17:31:31,999 INFO L628 ElimStorePlain]: treesize reduction 52, result has 83.0 percent of original size [2021-07-09 17:31:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:32,008 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:32,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,084 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1151 vanished before elimination [2021-07-09 17:31:32,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:32,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:32,094 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:32,105 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:32,111 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:32,115 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:32,196 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:32,199 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:32,280 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:32,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:32,283 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:32,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:31:32,359 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-07-09 17:31:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002144740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:31:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636981429] [2021-07-09 17:31:32,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:32,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:32,525 INFO L87 Difference]: Start difference. First operand 233 states and 696 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,994 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-07-09 17:31:33,255 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-09 17:31:33,568 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-07-09 17:31:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,610 INFO L93 Difference]: Finished difference Result 344 states and 985 transitions. [2021-07-09 17:31:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,611 INFO L225 Difference]: With dead ends: 344 [2021-07-09 17:31:33,611 INFO L226 Difference]: Without dead ends: 340 [2021-07-09 17:31:33,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1250.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-07-09 17:31:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 233. [2021-07-09 17:31:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.0) internal successors, (696), 232 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 696 transitions. [2021-07-09 17:31:33,614 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 696 transitions. Word has length 17 [2021-07-09 17:31:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,614 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 696 transitions. [2021-07-09 17:31:33,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 696 transitions. [2021-07-09 17:31:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:33,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,615 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:33,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4634,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:33,815 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:33,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1746863934, now seen corresponding path program 131 times [2021-07-09 17:31:33,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:33,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972087691] [2021-07-09 17:31:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972087691] [2021-07-09 17:31:34,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972087691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860505434] [2021-07-09 17:31:34,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:34,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:34,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:34,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:34,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:34,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:31:34,258 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:177, output treesize:167 [2021-07-09 17:31:34,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:34,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:34,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,684 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-07-09 17:31:34,685 INFO L628 ElimStorePlain]: treesize reduction 91, result has 77.8 percent of original size [2021-07-09 17:31:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:34,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:34,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:34,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,791 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1162 vanished before elimination [2021-07-09 17:31:34,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:34,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:34,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:34,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:34,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:34,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:34,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:31:34,918 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:31:34,923 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:34,940 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:34,945 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-07-09 17:31:34,950 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:34,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:34,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:34,962 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:35,066 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:35,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:35,168 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:35,172 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:31:35,281 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:35,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:35,286 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:35,290 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:35,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,399 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 17:31:35,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:35,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:31:35,403 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:424, output treesize:170 [2021-07-09 17:31:35,546 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 17:31:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860505434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 17:31:35,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125144937] [2021-07-09 17:31:35,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:35,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:35,610 INFO L87 Difference]: Start difference. First operand 233 states and 696 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,032 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-07-09 17:31:36,349 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-07-09 17:31:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:36,428 INFO L93 Difference]: Finished difference Result 336 states and 971 transitions. [2021-07-09 17:31:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:36,429 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:31:36,429 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:31:36,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1014.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:31:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2021-07-09 17:31:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.991304347826087) internal successors, (688), 230 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-07-09 17:31:36,432 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 17 [2021-07-09 17:31:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:36,432 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-07-09 17:31:36,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-07-09 17:31:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:36,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:36,433 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:36,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4652,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,633 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash 932699114, now seen corresponding path program 132 times [2021-07-09 17:31:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:36,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643275081] [2021-07-09 17:31:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643275081] [2021-07-09 17:31:36,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643275081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899661506] [2021-07-09 17:31:36,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:36,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:36,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:36,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:36,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:36,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:36,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:36,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:36,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:36,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:36,994 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-07-09 17:31:37,084 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1164, v_prenex_1166, v_prenex_1168], 1=[array_0, v_prenex_1163, v_prenex_1165, v_prenex_1167]} [2021-07-09 17:31:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:37,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:37,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:37,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:37,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:37,309 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:31:37,309 INFO L628 ElimStorePlain]: treesize reduction 88, result has 78.4 percent of original size [2021-07-09 17:31:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:37,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:37,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:37,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:37,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:37,594 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-07-09 17:31:37,594 INFO L628 ElimStorePlain]: treesize reduction 39, result has 88.3 percent of original size [2021-07-09 17:31:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:37,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,748 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-09 17:31:37,749 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.9 percent of original size [2021-07-09 17:31:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:37,753 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:37,758 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:37,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:37,776 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:37,780 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:37,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:37,858 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:37,939 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:37,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:37,942 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:37,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:38,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1167 vanished before elimination [2021-07-09 17:31:38,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:38,015 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-07-09 17:31:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899661506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:38,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:31:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323263978] [2021-07-09 17:31:38,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:38,188 INFO L87 Difference]: Start difference. First operand 231 states and 688 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,635 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-09 17:31:38,854 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-09 17:31:39,118 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-07-09 17:31:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:39,159 INFO L93 Difference]: Finished difference Result 331 states and 957 transitions. [2021-07-09 17:31:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:39,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:39,160 INFO L225 Difference]: With dead ends: 331 [2021-07-09 17:31:39,160 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:31:39,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1075.8ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:31:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2021-07-09 17:31:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.9911504424778763) internal successors, (676), 226 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 676 transitions. [2021-07-09 17:31:39,163 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 676 transitions. Word has length 17 [2021-07-09 17:31:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:39,163 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 676 transitions. [2021-07-09 17:31:39,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 676 transitions. [2021-07-09 17:31:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:39,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:39,164 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:39,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-07-09 17:31:39,373 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2073250540, now seen corresponding path program 133 times [2021-07-09 17:31:39,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:39,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763057404] [2021-07-09 17:31:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:39,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763057404] [2021-07-09 17:31:39,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763057404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716642037] [2021-07-09 17:31:39,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:39,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:39,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:39,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:39,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:39,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:39,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:39,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-07-09 17:31:39,918 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1171, array_2, v_prenex_1173, v_prenex_1169], 1=[v_prenex_1170, v_prenex_1172, v_prenex_1174, array_4]} [2021-07-09 17:31:39,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:39,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:39,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:40,121 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-07-09 17:31:40,122 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.6 percent of original size [2021-07-09 17:31:40,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:40,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:40,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:40,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-07-09 17:31:40,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:40,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 17:31:40,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:40,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,366 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-07-09 17:31:40,366 INFO L628 ElimStorePlain]: treesize reduction 21, result has 91.8 percent of original size [2021-07-09 17:31:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:40,370 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:40,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:40,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:40,444 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:40,525 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:40,529 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:40,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:40,612 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:40,615 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:40,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:40,619 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:40,622 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:40,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:40,680 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:31:40,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:31:40,681 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-07-09 17:31:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716642037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:40,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:31:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719016480] [2021-07-09 17:31:40,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:40,823 INFO L87 Difference]: Start difference. First operand 227 states and 676 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,331 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-07-09 17:31:41,587 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-07-09 17:31:41,771 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-09 17:31:41,994 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-07-09 17:31:42,257 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-09 17:31:42,544 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-07-09 17:31:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:42,621 INFO L93 Difference]: Finished difference Result 355 states and 1007 transitions. [2021-07-09 17:31:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:42,622 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:31:42,622 INFO L226 Difference]: Without dead ends: 343 [2021-07-09 17:31:42,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1883.0ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-07-09 17:31:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 232. [2021-07-09 17:31:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.9913419913419914) internal successors, (691), 231 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 691 transitions. [2021-07-09 17:31:42,625 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 691 transitions. Word has length 17 [2021-07-09 17:31:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:42,625 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 691 transitions. [2021-07-09 17:31:42,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 691 transitions. [2021-07-09 17:31:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:42,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:42,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:42,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4714 [2021-07-09 17:31:42,841 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1879133244, now seen corresponding path program 134 times [2021-07-09 17:31:42,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:42,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879580284] [2021-07-09 17:31:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:42,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:42,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879580284] [2021-07-09 17:31:42,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879580284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732249802] [2021-07-09 17:31:42,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:42,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:43,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:43,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:43,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:43,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:43,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-07-09 17:31:43,244 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1180, array_2, v_prenex_1176, v_prenex_1178], 1=[array_0, v_prenex_1175, v_prenex_1177, v_prenex_1179]} [2021-07-09 17:31:43,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:43,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:43,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,403 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-07-09 17:31:43,404 INFO L628 ElimStorePlain]: treesize reduction 114, result has 68.3 percent of original size [2021-07-09 17:31:43,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:43,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:43,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:43,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:43,423 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:43,509 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:43,600 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:43,758 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-09 17:31:43,759 INFO L628 ElimStorePlain]: treesize reduction 39, result has 87.0 percent of original size [2021-07-09 17:31:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:43,764 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:43,768 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:43,782 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:43,786 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:43,790 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:43,865 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:43,868 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:43,946 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:43,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:43,949 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:43,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:44,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:44,021 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1179 vanished before elimination [2021-07-09 17:31:44,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:44,022 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-07-09 17:31:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:44,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732249802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:44,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:31:44,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811388614] [2021-07-09 17:31:44,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:44,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:44,190 INFO L87 Difference]: Start difference. First operand 232 states and 691 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,646 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 17:31:44,857 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-09 17:31:45,127 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-07-09 17:31:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:45,166 INFO L93 Difference]: Finished difference Result 332 states and 960 transitions. [2021-07-09 17:31:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:45,167 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:31:45,167 INFO L226 Difference]: Without dead ends: 324 [2021-07-09 17:31:45,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-07-09 17:31:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 232. [2021-07-09 17:31:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.9913419913419914) internal successors, (691), 231 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 691 transitions. [2021-07-09 17:31:45,170 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 691 transitions. Word has length 17 [2021-07-09 17:31:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:45,170 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 691 transitions. [2021-07-09 17:31:45,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 691 transitions. [2021-07-09 17:31:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:45,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:45,171 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:45,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4731,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,371 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:45,372 INFO L82 PathProgramCache]: Analyzing trace with hash -798958798, now seen corresponding path program 135 times [2021-07-09 17:31:45,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:45,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481976147] [2021-07-09 17:31:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481976147] [2021-07-09 17:31:45,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481976147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006685920] [2021-07-09 17:31:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:31:45,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:45,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:45,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:45,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:45,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:45,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:45,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:45,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:45,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-07-09 17:31:45,770 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1182, v_prenex_1184, v_prenex_1186, array_4], 1=[v_prenex_1181, v_prenex_1183, v_prenex_1185, array_2]} [2021-07-09 17:31:45,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:45,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:31:45,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:31:45,937 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-07-09 17:31:45,937 INFO L628 ElimStorePlain]: treesize reduction 145, result has 65.0 percent of original size [2021-07-09 17:31:45,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:45,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:45,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:45,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:31:46,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,155 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-09 17:31:46,156 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.4 percent of original size [2021-07-09 17:31:46,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:46,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:46,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:46,164 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 17:31:46,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:46,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,299 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-07-09 17:31:46,300 INFO L628 ElimStorePlain]: treesize reduction 11, result has 95.7 percent of original size [2021-07-09 17:31:46,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:46,304 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:46,307 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:46,379 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:46,382 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,450 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1185 vanished before elimination [2021-07-09 17:31:46,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:46,454 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:46,458 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:46,462 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-07-09 17:31:46,465 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:46,477 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:46,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:46,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:46,540 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 8 variables, input treesize:344, output treesize:136 [2021-07-09 17:31:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006685920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:31:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190445164] [2021-07-09 17:31:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:31:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:31:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:31:46,675 INFO L87 Difference]: Start difference. First operand 232 states and 691 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,080 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-09 17:31:47,295 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-09 17:31:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:47,348 INFO L93 Difference]: Finished difference Result 330 states and 957 transitions. [2021-07-09 17:31:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:31:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:47,349 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:31:47,349 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:31:47,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:31:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2021-07-09 17:31:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.991228070175439) internal successors, (682), 228 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-07-09 17:31:47,353 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 17 [2021-07-09 17:31:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:47,353 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-07-09 17:31:47,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-07-09 17:31:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:31:47,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:47,353 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:47,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4750 [2021-07-09 17:31:47,554 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:47,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash 309049932, now seen corresponding path program 136 times [2021-07-09 17:31:47,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:47,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505781012] [2021-07-09 17:31:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:47,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505781012] [2021-07-09 17:31:47,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505781012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972727286] [2021-07-09 17:31:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:47,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:47,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:47,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:47,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:47,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:47,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:47,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:47,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:47,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:47,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:31:47,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-07-09 17:31:47,984 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1188], 1=[array_0, v_prenex_1187]} [2021-07-09 17:31:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:47,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:47,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:47,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:48,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:31:48,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,141 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-09 17:31:48,142 INFO L628 ElimStorePlain]: treesize reduction 81, result has 74.1 percent of original size [2021-07-09 17:31:48,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 17:31:48,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:48,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:48,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:48,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:31:48,154 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:48,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:48,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:48,316 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-09 17:31:48,316 INFO L628 ElimStorePlain]: treesize reduction 39, result has 87.0 percent of original size [2021-07-09 17:31:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:48,321 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:48,325 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:48,404 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:48,409 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:48,413 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-07-09 17:31:48,425 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-07-09 17:31:48,429 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:31:48,443 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:48,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:48,447 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:48,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:48,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:31:48,528 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:374, output treesize:161 [2021-07-09 17:31:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:48,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972727286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:48,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 17:31:48,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283035646] [2021-07-09 17:31:48,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:31:48,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:31:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:31:48,702 INFO L87 Difference]: Start difference. First operand 229 states and 682 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,045 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-09 17:31:49,302 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-07-09 17:31:49,673 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-07-09 17:31:50,084 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-07-09 17:31:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:50,127 INFO L93 Difference]: Finished difference Result 365 states and 1050 transitions. [2021-07-09 17:31:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:31:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:31:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:50,128 INFO L225 Difference]: With dead ends: 365 [2021-07-09 17:31:50,128 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 17:31:50,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1491.6ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 17:31:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 227. [2021-07-09 17:31:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.9911504424778763) internal successors, (676), 226 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 676 transitions. [2021-07-09 17:31:50,132 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 676 transitions. Word has length 17 [2021-07-09 17:31:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:50,132 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 676 transitions. [2021-07-09 17:31:50,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 676 transitions. [2021-07-09 17:31:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:50,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:50,133 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:50,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4770,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:50,333 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash -697232062, now seen corresponding path program 137 times [2021-07-09 17:31:50,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:50,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284615422] [2021-07-09 17:31:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:50,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284615422] [2021-07-09 17:31:50,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284615422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931563859] [2021-07-09 17:31:50,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:50,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:50,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:31:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:50,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:50,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:50,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:50,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:50,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:50,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:50,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,777 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:31:50,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:31:50,781 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-07-09 17:31:50,957 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:31:50,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:50,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:50,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:50,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,981 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:31:50,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:50,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:50,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:50,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:50,989 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:31:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:51,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931563859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:51,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:31:51,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053793166] [2021-07-09 17:31:51,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:51,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:51,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:51,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:51,010 INFO L87 Difference]: Start difference. First operand 227 states and 676 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,542 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-09 17:31:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:51,990 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-07-09 17:31:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:51,991 INFO L225 Difference]: With dead ends: 366 [2021-07-09 17:31:51,991 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:31:51,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:31:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 238. [2021-07-09 17:31:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9957805907172994) internal successors, (710), 237 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-07-09 17:31:51,994 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 18 [2021-07-09 17:31:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:51,994 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-07-09 17:31:51,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-07-09 17:31:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:51,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:51,995 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:52,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4791 [2021-07-09 17:31:52,195 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash -741485940, now seen corresponding path program 138 times [2021-07-09 17:31:52,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:52,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912902899] [2021-07-09 17:31:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:52,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:52,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912902899] [2021-07-09 17:31:52,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912902899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905396958] [2021-07-09 17:31:52,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:52,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:31:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:31:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:52,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:52,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:52,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:52,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:52,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:31:52,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:52,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:52,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:52,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:31:52,738 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:172, output treesize:146 [2021-07-09 17:31:53,058 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_0]} [2021-07-09 17:31:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:53,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:53,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:53,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:53,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:53,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:31:53,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:53,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:31:53,106 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:53,111 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:31:53,116 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:53,121 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:53,125 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,253 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-09 17:31:53,254 INFO L628 ElimStorePlain]: treesize reduction 122, result has 52.0 percent of original size [2021-07-09 17:31:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:31:53,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:53,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:31:53,262 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:53,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:53,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:31:53,311 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:405, output treesize:58 [2021-07-09 17:31:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905396958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:53,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:31:53,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060438819] [2021-07-09 17:31:53,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:53,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:53,390 INFO L87 Difference]: Start difference. First operand 238 states and 710 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,181 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-07-09 17:31:54,640 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-07-09 17:31:55,035 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-07-09 17:31:55,438 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 125 [2021-07-09 17:31:55,670 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2021-07-09 17:31:55,868 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-07-09 17:31:56,261 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2021-07-09 17:31:56,521 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 126 [2021-07-09 17:31:56,823 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 113 [2021-07-09 17:31:57,018 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-07-09 17:31:57,490 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-07-09 17:31:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:57,572 INFO L93 Difference]: Finished difference Result 591 states and 1634 transitions. [2021-07-09 17:31:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:31:57,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:57,573 INFO L225 Difference]: With dead ends: 591 [2021-07-09 17:31:57,573 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:31:57,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3900.0ms TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:31:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:31:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 279. [2021-07-09 17:31:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.9568345323741005) internal successors, (822), 278 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 822 transitions. [2021-07-09 17:31:57,578 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 822 transitions. Word has length 18 [2021-07-09 17:31:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:57,578 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 822 transitions. [2021-07-09 17:31:57,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 822 transitions. [2021-07-09 17:31:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:57,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:57,578 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:57,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4807,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,779 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1648668880, now seen corresponding path program 139 times [2021-07-09 17:31:57,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:57,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031811152] [2021-07-09 17:31:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:57,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:57,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031811152] [2021-07-09 17:31:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031811152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:57,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453190242] [2021-07-09 17:31:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:31:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:58,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:31:58,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:58,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:58,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:58,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:31:58,123 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:31:58,127 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,221 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:31:58,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:31:58,224 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-07-09 17:31:58,429 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:31:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:31:58,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:31:58,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:58,458 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:31:58,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:31:58,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:31:58,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:58,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:58,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:58,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:31:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453190242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:58,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:31:58,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103367416] [2021-07-09 17:31:58,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:31:58,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:31:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:31:58,494 INFO L87 Difference]: Start difference. First operand 279 states and 822 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,984 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-07-09 17:31:59,173 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:31:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:59,454 INFO L93 Difference]: Finished difference Result 398 states and 1123 transitions. [2021-07-09 17:31:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:31:59,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:31:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:59,455 INFO L225 Difference]: With dead ends: 398 [2021-07-09 17:31:59,455 INFO L226 Difference]: Without dead ends: 392 [2021-07-09 17:31:59,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 996.1ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-09 17:31:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 281. [2021-07-09 17:31:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.9535714285714287) internal successors, (827), 280 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 827 transitions. [2021-07-09 17:31:59,459 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 827 transitions. Word has length 18 [2021-07-09 17:31:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:59,459 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 827 transitions. [2021-07-09 17:31:59,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 827 transitions. [2021-07-09 17:31:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:31:59,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:59,459 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:59,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4844,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:59,660 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:59,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1165060546, now seen corresponding path program 140 times [2021-07-09 17:31:59,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:59,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393991159] [2021-07-09 17:31:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393991159] [2021-07-09 17:31:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393991159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024238959] [2021-07-09 17:31:59,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:59,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:31:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:00,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:00,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:00,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:00,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:00,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:00,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:00,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,119 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:32:00,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:00,123 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-07-09 17:32:00,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:00,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:00,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,352 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-07-09 17:32:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:00,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:00,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:00,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:00,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:00,409 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1220 vanished before elimination [2021-07-09 17:32:00,409 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:00,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:00,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:00,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:00,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:00,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:00,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:00,446 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:32:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024238959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:00,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277692829] [2021-07-09 17:32:00,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:00,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:00,504 INFO L87 Difference]: Start difference. First operand 281 states and 827 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,052 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:32:01,440 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-07-09 17:32:01,679 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-07-09 17:32:01,849 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-07-09 17:32:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:02,175 INFO L93 Difference]: Finished difference Result 485 states and 1284 transitions. [2021-07-09 17:32:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:02,176 INFO L225 Difference]: With dead ends: 485 [2021-07-09 17:32:02,176 INFO L226 Difference]: Without dead ends: 477 [2021-07-09 17:32:02,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1593.7ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-09 17:32:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 281. [2021-07-09 17:32:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.9535714285714287) internal successors, (827), 280 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 827 transitions. [2021-07-09 17:32:02,181 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 827 transitions. Word has length 18 [2021-07-09 17:32:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:02,181 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 827 transitions. [2021-07-09 17:32:02,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 827 transitions. [2021-07-09 17:32:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:02,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:02,181 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:02,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4860 [2021-07-09 17:32:02,382 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:02,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:02,382 INFO L82 PathProgramCache]: Analyzing trace with hash 575583500, now seen corresponding path program 141 times [2021-07-09 17:32:02,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:02,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366819886] [2021-07-09 17:32:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366819886] [2021-07-09 17:32:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366819886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349831760] [2021-07-09 17:32:02,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:32:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:02,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:02,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:02,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:02,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:02,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:02,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:02,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:02,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:02,906 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:32:02,906 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:02,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:02,910 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:03,068 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:32:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:03,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:03,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:03,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,094 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:32:03,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:03,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:03,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:03,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:03,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:03,102 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:32:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349831760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:03,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:03,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997039656] [2021-07-09 17:32:03,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:03,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:03,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:03,124 INFO L87 Difference]: Start difference. First operand 281 states and 827 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,750 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:32:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:04,007 INFO L93 Difference]: Finished difference Result 373 states and 1063 transitions. [2021-07-09 17:32:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:04,008 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:32:04,008 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:32:04,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 991.0ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:32:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-07-09 17:32:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.954225352112676) internal successors, (839), 284 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-07-09 17:32:04,012 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 18 [2021-07-09 17:32:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:04,012 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-07-09 17:32:04,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-07-09 17:32:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:04,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:04,013 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:04,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4882 [2021-07-09 17:32:04,213 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1033000770, now seen corresponding path program 142 times [2021-07-09 17:32:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921376724] [2021-07-09 17:32:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:04,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:04,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921376724] [2021-07-09 17:32:04,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921376724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368836327] [2021-07-09 17:32:04,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:04,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:04,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:04,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:04,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:04,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:04,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:04,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:04,746 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:04,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:04,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:04,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:04,806 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:190, output treesize:164 [2021-07-09 17:32:05,065 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-07-09 17:32:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:05,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:05,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:05,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:05,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:05,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:05,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:05,098 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:05,103 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:05,108 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:05,112 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:05,117 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:05,121 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,228 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-09 17:32:05,229 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-07-09 17:32:05,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:05,233 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:05,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:05,237 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:05,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:05,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:32:05,278 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-07-09 17:32:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368836327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:05,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775626401] [2021-07-09 17:32:05,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:05,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:05,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:05,360 INFO L87 Difference]: Start difference. First operand 285 states and 839 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,249 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2021-07-09 17:32:06,735 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2021-07-09 17:32:07,222 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 17:32:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:07,679 INFO L93 Difference]: Finished difference Result 506 states and 1412 transitions. [2021-07-09 17:32:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:32:07,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:07,680 INFO L225 Difference]: With dead ends: 506 [2021-07-09 17:32:07,680 INFO L226 Difference]: Without dead ends: 470 [2021-07-09 17:32:07,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2161.0ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:32:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-09 17:32:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 297. [2021-07-09 17:32:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9628378378378377) internal successors, (877), 296 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 877 transitions. [2021-07-09 17:32:07,685 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 877 transitions. Word has length 18 [2021-07-09 17:32:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:07,685 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 877 transitions. [2021-07-09 17:32:07,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 877 transitions. [2021-07-09 17:32:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:07,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:07,686 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:07,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4902 [2021-07-09 17:32:07,911 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2056821370, now seen corresponding path program 143 times [2021-07-09 17:32:07,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:07,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536057565] [2021-07-09 17:32:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536057565] [2021-07-09 17:32:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536057565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384409983] [2021-07-09 17:32:08,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:08,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:08,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:08,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:08,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:08,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:08,322 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:08,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,432 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:32:08,432 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:08,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:08,437 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:08,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:08,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:08,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,616 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-07-09 17:32:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:08,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:08,640 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:08,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:08,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:08,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:08,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1243 vanished before elimination [2021-07-09 17:32:08,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:08,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:08,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:08,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:08,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:08,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:08,705 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:32:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384409983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365508464] [2021-07-09 17:32:08,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:08,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:08,765 INFO L87 Difference]: Start difference. First operand 297 states and 877 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,596 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-07-09 17:32:09,772 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-07-09 17:32:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:10,040 INFO L93 Difference]: Finished difference Result 459 states and 1244 transitions. [2021-07-09 17:32:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:10,041 INFO L225 Difference]: With dead ends: 459 [2021-07-09 17:32:10,041 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:32:10,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1370.8ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:32:10,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-07-09 17:32:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9659863945578233) internal successors, (872), 294 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-07-09 17:32:10,045 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-07-09 17:32:10,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:10,045 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-07-09 17:32:10,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-07-09 17:32:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:10,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:10,046 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:10,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4944,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:10,246 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash 740664066, now seen corresponding path program 144 times [2021-07-09 17:32:10,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:10,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63302007] [2021-07-09 17:32:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:10,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63302007] [2021-07-09 17:32:10,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63302007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351764457] [2021-07-09 17:32:10,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:10,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:10,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:10,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:10,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:10,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:10,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:10,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:10,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:10,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:10,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:10,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:10,820 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-07-09 17:32:11,002 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:32:11,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:32:11,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:11,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:11,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:11,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:11,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:11,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:11,034 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:11,040 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:11,045 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:11,050 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:11,055 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:11,060 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,210 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-09 17:32:11,211 INFO L628 ElimStorePlain]: treesize reduction 119, result has 59.7 percent of original size [2021-07-09 17:32:11,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:11,215 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:11,220 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:11,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:32:11,223 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:11,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:11,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:32:11,281 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:99 [2021-07-09 17:32:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351764457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:11,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86950244] [2021-07-09 17:32:11,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:11,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:11,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:11,381 INFO L87 Difference]: Start difference. First operand 295 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,040 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2021-07-09 17:32:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:12,313 INFO L93 Difference]: Finished difference Result 386 states and 1106 transitions. [2021-07-09 17:32:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:12,314 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:32:12,314 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:32:12,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1104.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:32:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 295. [2021-07-09 17:32:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9659863945578233) internal successors, (872), 294 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-07-09 17:32:12,318 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-07-09 17:32:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:12,318 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-07-09 17:32:12,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-07-09 17:32:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:12,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:12,319 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:12,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4962,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:12,519 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1935700240, now seen corresponding path program 145 times [2021-07-09 17:32:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:12,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59404924] [2021-07-09 17:32:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:12,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59404924] [2021-07-09 17:32:12,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59404924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194111255] [2021-07-09 17:32:12,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:12,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:12,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:12,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:12,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:12,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:12,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:12,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,087 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-09 17:32:13,087 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:13,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:13,091 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:13,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:13,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:13,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:13,296 INFO L628 ElimStorePlain]: treesize reduction 104, result has 47.2 percent of original size [2021-07-09 17:32:13,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:13,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:13,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:13,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:13,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:13,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:13,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:13,396 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:13,396 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1263 vanished before elimination [2021-07-09 17:32:13,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:13,397 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:32:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194111255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:13,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:13,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808368806] [2021-07-09 17:32:13,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:13,463 INFO L87 Difference]: Start difference. First operand 295 states and 872 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,374 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2021-07-09 17:32:14,785 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 17:32:15,204 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-07-09 17:32:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:15,685 INFO L93 Difference]: Finished difference Result 520 states and 1474 transitions. [2021-07-09 17:32:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:32:15,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:15,686 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:32:15,686 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:32:15,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2027.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:32:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:32:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 311. [2021-07-09 17:32:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0193548387096776) internal successors, (936), 310 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-07-09 17:32:15,690 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 18 [2021-07-09 17:32:15,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:15,690 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-07-09 17:32:15,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-07-09 17:32:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:15,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:15,691 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:15,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5000 [2021-07-09 17:32:15,891 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -878029186, now seen corresponding path program 146 times [2021-07-09 17:32:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:15,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042468066] [2021-07-09 17:32:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:16,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042468066] [2021-07-09 17:32:16,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042468066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546305444] [2021-07-09 17:32:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:16,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:16,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:16,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:16,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:16,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:16,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:16,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:16,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,429 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-09 17:32:16,429 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:16,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:16,433 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:16,591 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1272, array_4], 1=[v_prenex_1271, array_2]} [2021-07-09 17:32:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:16,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:16,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,627 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:32:16,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:16,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:16,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:16,643 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1271 vanished before elimination [2021-07-09 17:32:16,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:16,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:16,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:16,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:16,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:16,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:16,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:16,668 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-07-09 17:32:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546305444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:16,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:16,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549787070] [2021-07-09 17:32:16,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:16,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:16,693 INFO L87 Difference]: Start difference. First operand 311 states and 936 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,852 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-07-09 17:32:18,032 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-07-09 17:32:18,286 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2021-07-09 17:32:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:19,010 INFO L93 Difference]: Finished difference Result 536 states and 1555 transitions. [2021-07-09 17:32:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:32:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:19,011 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:32:19,012 INFO L226 Difference]: Without dead ends: 515 [2021-07-09 17:32:19,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2064.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:32:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-09 17:32:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 322. [2021-07-09 17:32:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.046728971962617) internal successors, (978), 321 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 978 transitions. [2021-07-09 17:32:19,016 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 978 transitions. Word has length 18 [2021-07-09 17:32:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:19,016 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 978 transitions. [2021-07-09 17:32:19,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 978 transitions. [2021-07-09 17:32:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:19,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:19,017 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:19,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5026,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:19,217 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash 69237234, now seen corresponding path program 147 times [2021-07-09 17:32:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:19,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694723171] [2021-07-09 17:32:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:19,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:19,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694723171] [2021-07-09 17:32:19,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694723171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460340587] [2021-07-09 17:32:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:19,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:32:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:19,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:19,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:19,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:19,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:19,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:19,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:19,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,716 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:32:19,716 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:19,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:19,720 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:19,877 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:32:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:19,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:19,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,902 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:32:19,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:19,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:19,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:19,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:19,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:19,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:32:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:19,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460340587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:19,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757195832] [2021-07-09 17:32:19,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:19,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:19,930 INFO L87 Difference]: Start difference. First operand 322 states and 978 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,512 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-07-09 17:32:20,652 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-07-09 17:32:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:20,795 INFO L93 Difference]: Finished difference Result 430 states and 1261 transitions. [2021-07-09 17:32:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:20,797 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:32:20,797 INFO L226 Difference]: Without dead ends: 424 [2021-07-09 17:32:20,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1003.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-09 17:32:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 328. [2021-07-09 17:32:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0428134556574924) internal successors, (995), 327 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 995 transitions. [2021-07-09 17:32:20,801 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 995 transitions. Word has length 18 [2021-07-09 17:32:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:20,801 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 995 transitions. [2021-07-09 17:32:20,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 995 transitions. [2021-07-09 17:32:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:20,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:20,801 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:21,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,002 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1539347036, now seen corresponding path program 148 times [2021-07-09 17:32:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:21,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295325705] [2021-07-09 17:32:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295325705] [2021-07-09 17:32:21,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295325705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605566351] [2021-07-09 17:32:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:21,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:21,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:21,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:21,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:21,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:21,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:21,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:21,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:21,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:21,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:21,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:21,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:21,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:21,582 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:190, output treesize:164 [2021-07-09 17:32:21,847 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-07-09 17:32:21,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:21,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:21,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:21,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:21,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:21,871 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:21,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:21,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:21,886 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:21,890 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:21,895 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:21,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:21,899 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:21,903 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,015 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-09 17:32:22,015 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-07-09 17:32:22,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:22,019 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:22,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:22,023 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:22,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:22,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:32:22,063 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-07-09 17:32:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605566351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:22,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:22,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397958143] [2021-07-09 17:32:22,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:22,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:22,141 INFO L87 Difference]: Start difference. First operand 328 states and 995 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,108 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2021-07-09 17:32:23,743 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2021-07-09 17:32:24,040 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-07-09 17:32:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:24,663 INFO L93 Difference]: Finished difference Result 585 states and 1675 transitions. [2021-07-09 17:32:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:32:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:24,665 INFO L225 Difference]: With dead ends: 585 [2021-07-09 17:32:24,665 INFO L226 Difference]: Without dead ends: 549 [2021-07-09 17:32:24,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2405.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:32:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-09 17:32:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 340. [2021-07-09 17:32:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0353982300884956) internal successors, (1029), 339 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1029 transitions. [2021-07-09 17:32:24,670 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1029 transitions. Word has length 18 [2021-07-09 17:32:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:24,670 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1029 transitions. [2021-07-09 17:32:24,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1029 transitions. [2021-07-09 17:32:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:24,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:24,670 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:24,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5065 [2021-07-09 17:32:24,871 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1550475104, now seen corresponding path program 149 times [2021-07-09 17:32:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:24,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18371725] [2021-07-09 17:32:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18371725] [2021-07-09 17:32:24,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18371725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256820846] [2021-07-09 17:32:24,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:25,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:25,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:25,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:25,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:25,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:25,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:25,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:25,284 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,390 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:32:25,391 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:25,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:25,395 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:25,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:25,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:25,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,589 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-07-09 17:32:25,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:25,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:25,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1294 vanished before elimination [2021-07-09 17:32:25,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:25,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:25,644 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1296 vanished before elimination [2021-07-09 17:32:25,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:25,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:25,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:25,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:25,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:25,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:25,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:25,680 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:32:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256820846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:25,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:25,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695598967] [2021-07-09 17:32:25,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:25,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:25,750 INFO L87 Difference]: Start difference. First operand 340 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,607 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-07-09 17:32:26,777 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-07-09 17:32:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:27,166 INFO L93 Difference]: Finished difference Result 529 states and 1464 transitions. [2021-07-09 17:32:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:27,168 INFO L225 Difference]: With dead ends: 529 [2021-07-09 17:32:27,168 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:32:27,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1479.0ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:32:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 338. [2021-07-09 17:32:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0385756676557865) internal successors, (1024), 337 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1024 transitions. [2021-07-09 17:32:27,174 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1024 transitions. Word has length 18 [2021-07-09 17:32:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:27,174 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1024 transitions. [2021-07-09 17:32:27,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1024 transitions. [2021-07-09 17:32:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:27,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:27,175 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:27,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5107 [2021-07-09 17:32:27,375 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:27,376 INFO L82 PathProgramCache]: Analyzing trace with hash 234317800, now seen corresponding path program 150 times [2021-07-09 17:32:27,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:27,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529612362] [2021-07-09 17:32:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:27,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529612362] [2021-07-09 17:32:27,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529612362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682146470] [2021-07-09 17:32:27,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:27,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:27,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:27,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:27,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:27,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:27,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:27,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:27,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:27,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:27,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:27,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:27,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:27,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:27,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:27,948 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-07-09 17:32:28,123 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:32:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:28,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:28,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:28,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:28,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:28,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:28,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:28,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:28,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:28,165 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:28,170 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:28,175 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:32:28,179 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,331 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 17:32:28,331 INFO L628 ElimStorePlain]: treesize reduction 138, result has 56.1 percent of original size [2021-07-09 17:32:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:28,336 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:32:28,342 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:28,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:28,346 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:28,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:28,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:32:28,412 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:99 [2021-07-09 17:32:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:28,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682146470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:28,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025978942] [2021-07-09 17:32:28,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:28,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:28,508 INFO L87 Difference]: Start difference. First operand 338 states and 1024 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,196 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2021-07-09 17:32:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:29,472 INFO L93 Difference]: Finished difference Result 443 states and 1300 transitions. [2021-07-09 17:32:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:29,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:29,473 INFO L225 Difference]: With dead ends: 443 [2021-07-09 17:32:29,473 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:32:29,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:32:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 338. [2021-07-09 17:32:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0385756676557865) internal successors, (1024), 337 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1024 transitions. [2021-07-09 17:32:29,477 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1024 transitions. Word has length 18 [2021-07-09 17:32:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:29,477 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1024 transitions. [2021-07-09 17:32:29,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1024 transitions. [2021-07-09 17:32:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:29,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:29,478 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:29,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5125,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,679 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1429353974, now seen corresponding path program 151 times [2021-07-09 17:32:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:29,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139573992] [2021-07-09 17:32:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:29,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139573992] [2021-07-09 17:32:29,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139573992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530025126] [2021-07-09 17:32:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:30,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:30,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:30,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:30,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:30,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:30,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,228 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-09 17:32:30,228 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:30,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:30,232 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:30,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:30,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:30,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,436 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-07-09 17:32:30,437 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:30,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:30,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:30,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:30,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:30,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:30,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:30,529 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1315 vanished before elimination [2021-07-09 17:32:30,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:30,530 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:32:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530025126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:30,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:30,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654098461] [2021-07-09 17:32:30,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:30,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:30,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:30,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:30,594 INFO L87 Difference]: Start difference. First operand 338 states and 1024 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,485 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-09 17:32:31,845 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 17:32:32,239 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-07-09 17:32:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:32,698 INFO L93 Difference]: Finished difference Result 581 states and 1679 transitions. [2021-07-09 17:32:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:32:32,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:32,700 INFO L225 Difference]: With dead ends: 581 [2021-07-09 17:32:32,700 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:32:32,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1991.3ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:32:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:32:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-07-09 17:32:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0469208211143695) internal successors, (1039), 341 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1039 transitions. [2021-07-09 17:32:32,705 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1039 transitions. Word has length 18 [2021-07-09 17:32:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:32,705 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1039 transitions. [2021-07-09 17:32:32,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1039 transitions. [2021-07-09 17:32:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:32,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:32,705 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:32,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5154 [2021-07-09 17:32:32,915 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1384375452, now seen corresponding path program 152 times [2021-07-09 17:32:32,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:32,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599597586] [2021-07-09 17:32:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:33,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599597586] [2021-07-09 17:32:33,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599597586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367482797] [2021-07-09 17:32:33,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:33,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:33,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:33,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:33,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:33,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:33,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:33,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:33,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,489 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-09 17:32:33,489 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:32:33,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:33,493 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:32:33,660 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1324], 1=[array_2, v_prenex_1323]} [2021-07-09 17:32:33,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:33,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:33,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,699 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:32:33,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:33,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:33,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,716 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:32:33,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:33,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:33,722 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:33,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:33,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:33,741 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-07-09 17:32:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367482797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:33,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:33,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641153674] [2021-07-09 17:32:33,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:33,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:33,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:33,766 INFO L87 Difference]: Start difference. First operand 342 states and 1039 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,850 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-07-09 17:32:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:35,893 INFO L93 Difference]: Finished difference Result 596 states and 1739 transitions. [2021-07-09 17:32:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:32:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:35,894 INFO L225 Difference]: With dead ends: 596 [2021-07-09 17:32:35,894 INFO L226 Difference]: Without dead ends: 575 [2021-07-09 17:32:35,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1927.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:32:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-07-09 17:32:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 333. [2021-07-09 17:32:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0421686746987953) internal successors, (1010), 332 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1010 transitions. [2021-07-09 17:32:35,899 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1010 transitions. Word has length 18 [2021-07-09 17:32:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:35,899 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1010 transitions. [2021-07-09 17:32:35,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1010 transitions. [2021-07-09 17:32:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:35,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:35,900 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:36,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5180,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:36,101 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash -300912002, now seen corresponding path program 153 times [2021-07-09 17:32:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604619390] [2021-07-09 17:32:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604619390] [2021-07-09 17:32:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604619390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288029416] [2021-07-09 17:32:36,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:36,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:36,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:36,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:36,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:36,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:36,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:36,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:36,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:36,641 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-07-09 17:32:36,885 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-07-09 17:32:36,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:32:36,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:36,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:36,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:32:36,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:36,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:32:36,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:32:36,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:36,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:36,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:36,935 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:36,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:36,940 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:32:36,944 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,133 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-09 17:32:37,133 INFO L628 ElimStorePlain]: treesize reduction 110, result has 65.0 percent of original size [2021-07-09 17:32:37,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:37,138 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:37,143 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:37,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:32:37,147 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:37,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:37,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:32:37,222 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:459, output treesize:96 [2021-07-09 17:32:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:37,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288029416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:37,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:37,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856869822] [2021-07-09 17:32:37,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:37,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:37,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:37,320 INFO L87 Difference]: Start difference. First operand 333 states and 1010 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,955 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-07-09 17:32:38,281 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 98 [2021-07-09 17:32:38,608 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 106 [2021-07-09 17:32:38,825 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-07-09 17:32:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:38,907 INFO L93 Difference]: Finished difference Result 476 states and 1381 transitions. [2021-07-09 17:32:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:38,908 INFO L225 Difference]: With dead ends: 476 [2021-07-09 17:32:38,908 INFO L226 Difference]: Without dead ends: 464 [2021-07-09 17:32:38,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1661.1ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-09 17:32:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 333. [2021-07-09 17:32:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0421686746987953) internal successors, (1010), 332 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1010 transitions. [2021-07-09 17:32:38,913 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1010 transitions. Word has length 18 [2021-07-09 17:32:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:38,913 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1010 transitions. [2021-07-09 17:32:38,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1010 transitions. [2021-07-09 17:32:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:38,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:38,913 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:39,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5203,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:39,114 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:39,114 INFO L82 PathProgramCache]: Analyzing trace with hash 894124172, now seen corresponding path program 154 times [2021-07-09 17:32:39,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:39,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560596030] [2021-07-09 17:32:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:39,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560596030] [2021-07-09 17:32:39,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560596030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291931159] [2021-07-09 17:32:39,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:39,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:39,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:39,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:39,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:39,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:39,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:39,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:39,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,574 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-07-09 17:32:39,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:39,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-07-09 17:32:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:39,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:39,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,827 INFO L628 ElimStorePlain]: treesize reduction 82, result has 48.4 percent of original size [2021-07-09 17:32:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:39,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,852 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:39,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:39,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:39,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,879 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1342 vanished before elimination [2021-07-09 17:32:39,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:39,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:39,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:39,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:39,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:39,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:32:39,915 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:32:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291931159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:39,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167024706] [2021-07-09 17:32:39,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:39,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:39,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:39,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:39,974 INFO L87 Difference]: Start difference. First operand 333 states and 1010 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,649 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-07-09 17:32:41,137 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-07-09 17:32:41,372 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-07-09 17:32:41,671 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-07-09 17:32:42,149 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2021-07-09 17:32:42,408 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-07-09 17:32:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:42,644 INFO L93 Difference]: Finished difference Result 690 states and 1971 transitions. [2021-07-09 17:32:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:32:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:42,645 INFO L225 Difference]: With dead ends: 690 [2021-07-09 17:32:42,645 INFO L226 Difference]: Without dead ends: 663 [2021-07-09 17:32:42,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2496.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:32:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-09 17:32:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 350. [2021-07-09 17:32:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0659025787965617) internal successors, (1070), 349 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1070 transitions. [2021-07-09 17:32:42,651 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1070 transitions. Word has length 18 [2021-07-09 17:32:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:42,651 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1070 transitions. [2021-07-09 17:32:42,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1070 transitions. [2021-07-09 17:32:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:42,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:42,651 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:42,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5224 [2021-07-09 17:32:42,852 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1919605254, now seen corresponding path program 155 times [2021-07-09 17:32:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:42,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711806838] [2021-07-09 17:32:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:42,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:42,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711806838] [2021-07-09 17:32:42,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711806838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728739567] [2021-07-09 17:32:42,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:43,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:43,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:43,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:43,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:43,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:43,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:43,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:43,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:43,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:43,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,326 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-07-09 17:32:43,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:43,330 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-07-09 17:32:43,544 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1352, array_4], 1=[array_2, v_prenex_1351]} [2021-07-09 17:32:43,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:43,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:43,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,578 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:32:43,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:43,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:43,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:43,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:43,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:43,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:43,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:43,622 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1351 vanished before elimination [2021-07-09 17:32:43,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:43,623 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-07-09 17:32:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:43,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728739567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:43,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:43,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102502100] [2021-07-09 17:32:43,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:43,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:43,649 INFO L87 Difference]: Start difference. First operand 350 states and 1070 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,186 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-09 17:32:44,588 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-07-09 17:32:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:45,707 INFO L93 Difference]: Finished difference Result 670 states and 1934 transitions. [2021-07-09 17:32:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:32:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:45,709 INFO L225 Difference]: With dead ends: 670 [2021-07-09 17:32:45,709 INFO L226 Difference]: Without dead ends: 649 [2021-07-09 17:32:45,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1928.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:32:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-07-09 17:32:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 343. [2021-07-09 17:32:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0584795321637426) internal successors, (1046), 342 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1046 transitions. [2021-07-09 17:32:45,714 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1046 transitions. Word has length 18 [2021-07-09 17:32:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:45,714 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1046 transitions. [2021-07-09 17:32:45,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1046 transitions. [2021-07-09 17:32:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:45,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:45,715 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:45,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5250,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:45,915 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1803907236, now seen corresponding path program 156 times [2021-07-09 17:32:45,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:45,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25267771] [2021-07-09 17:32:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:46,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25267771] [2021-07-09 17:32:46,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25267771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743599389] [2021-07-09 17:32:46,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:46,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:46,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:46,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:46,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:46,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:46,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:46,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:46,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,381 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-07-09 17:32:46,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:46,385 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-07-09 17:32:46,565 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1360, array_4], 1=[array_2, v_prenex_1359]} [2021-07-09 17:32:46,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:46,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:46,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:46,611 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.0 percent of original size [2021-07-09 17:32:46,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:46,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:46,628 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:32:46,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:32:46,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:46,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:32:46,634 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:46,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:46,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:46,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:46,654 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-07-09 17:32:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:46,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743599389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:46,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:46,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:46,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204431235] [2021-07-09 17:32:46,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:46,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:46,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:46,678 INFO L87 Difference]: Start difference. First operand 343 states and 1046 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,872 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-07-09 17:32:48,313 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-07-09 17:32:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:48,837 INFO L93 Difference]: Finished difference Result 740 states and 2109 transitions. [2021-07-09 17:32:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:32:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:48,839 INFO L225 Difference]: With dead ends: 740 [2021-07-09 17:32:48,839 INFO L226 Difference]: Without dead ends: 719 [2021-07-09 17:32:48,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1918.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:32:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-09 17:32:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 342. [2021-07-09 17:32:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.067448680351906) internal successors, (1046), 341 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1046 transitions. [2021-07-09 17:32:48,845 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1046 transitions. Word has length 18 [2021-07-09 17:32:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:48,845 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1046 transitions. [2021-07-09 17:32:48,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1046 transitions. [2021-07-09 17:32:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:48,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:48,846 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:49,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5273,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,046 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1605107838, now seen corresponding path program 157 times [2021-07-09 17:32:49,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:49,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971507963] [2021-07-09 17:32:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971507963] [2021-07-09 17:32:49,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971507963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917797545] [2021-07-09 17:32:49,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:49,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:49,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:49,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:49,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,328 INFO L628 ElimStorePlain]: treesize reduction 34, result has 63.8 percent of original size [2021-07-09 17:32:49,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:49,330 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:60 [2021-07-09 17:32:49,478 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1363, array_4], 1=[array_0, v_prenex_1362]} [2021-07-09 17:32:49,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:49,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:49,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,523 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:32:49,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:49,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:49,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:49,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:49,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:49,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:49,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:49,569 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1362 vanished before elimination [2021-07-09 17:32:49,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:49,570 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:32:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917797545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:49,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:32:49,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646963344] [2021-07-09 17:32:49,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:49,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:49,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:49,591 INFO L87 Difference]: Start difference. First operand 342 states and 1046 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:50,936 INFO L93 Difference]: Finished difference Result 627 states and 1829 transitions. [2021-07-09 17:32:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:32:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:50,938 INFO L225 Difference]: With dead ends: 627 [2021-07-09 17:32:50,938 INFO L226 Difference]: Without dead ends: 602 [2021-07-09 17:32:50,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:32:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-09 17:32:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 367. [2021-07-09 17:32:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.098360655737705) internal successors, (1134), 366 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1134 transitions. [2021-07-09 17:32:50,943 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1134 transitions. Word has length 18 [2021-07-09 17:32:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:50,943 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1134 transitions. [2021-07-09 17:32:50,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1134 transitions. [2021-07-09 17:32:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:50,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:50,944 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:51,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5296 [2021-07-09 17:32:51,145 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash -343958516, now seen corresponding path program 158 times [2021-07-09 17:32:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:51,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847697437] [2021-07-09 17:32:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:51,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:51,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847697437] [2021-07-09 17:32:51,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847697437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664389910] [2021-07-09 17:32:51,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:51,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:51,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:51,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:51,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:51,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:51,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:51,364 INFO L628 ElimStorePlain]: treesize reduction 33, result has 63.7 percent of original size [2021-07-09 17:32:51,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:51,365 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-07-09 17:32:51,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:51,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:51,443 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:32:51,443 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:51,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:51,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:32:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:51,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664389910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:51,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:32:51,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602075187] [2021-07-09 17:32:51,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:32:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:32:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:32:51,461 INFO L87 Difference]: Start difference. First operand 367 states and 1134 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:51,817 INFO L93 Difference]: Finished difference Result 503 states and 1508 transitions. [2021-07-09 17:32:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:51,818 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:32:51,818 INFO L226 Difference]: Without dead ends: 492 [2021-07-09 17:32:51,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:51,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-09 17:32:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 379. [2021-07-09 17:32:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.105820105820106) internal successors, (1174), 378 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1174 transitions. [2021-07-09 17:32:51,823 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1174 transitions. Word has length 18 [2021-07-09 17:32:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:51,823 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1174 transitions. [2021-07-09 17:32:51,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,823 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1174 transitions. [2021-07-09 17:32:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:51,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:51,823 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:52,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,024 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2011020034, now seen corresponding path program 159 times [2021-07-09 17:32:52,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:52,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103490782] [2021-07-09 17:32:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:52,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103490782] [2021-07-09 17:32:52,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103490782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513868525] [2021-07-09 17:32:52,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:32:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:32:52,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:52,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:52,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,248 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.0 percent of original size [2021-07-09 17:32:52,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:52,249 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:66 [2021-07-09 17:32:52,295 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1364], 1=[array_4, v_prenex_1365]} [2021-07-09 17:32:52,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:52,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:52,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,338 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-07-09 17:32:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:52,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:52,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,358 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:52,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:52,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:52,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:52,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:52,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:52,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:52,388 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:153, output treesize:44 [2021-07-09 17:32:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513868525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:52,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:32:52,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795050265] [2021-07-09 17:32:52,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:32:52,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:52,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:32:52,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:32:52,447 INFO L87 Difference]: Start difference. First operand 379 states and 1174 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:52,807 INFO L93 Difference]: Finished difference Result 507 states and 1525 transitions. [2021-07-09 17:32:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:32:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:52,808 INFO L225 Difference]: With dead ends: 507 [2021-07-09 17:32:52,808 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:32:52,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:32:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 374. [2021-07-09 17:32:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.1018766756032172) internal successors, (1157), 373 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1157 transitions. [2021-07-09 17:32:52,813 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1157 transitions. Word has length 18 [2021-07-09 17:32:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:52,813 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1157 transitions. [2021-07-09 17:32:52,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1157 transitions. [2021-07-09 17:32:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:52,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:52,814 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:53,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-07-09 17:32:53,014 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:53,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1137279354, now seen corresponding path program 160 times [2021-07-09 17:32:53,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:53,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419379074] [2021-07-09 17:32:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:53,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:53,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419379074] [2021-07-09 17:32:53,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419379074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936723209] [2021-07-09 17:32:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:53,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:32:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:53,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:53,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:53,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:53,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:70, output treesize:56 [2021-07-09 17:32:53,291 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:32:53,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:53,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:53,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:53,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:32:53,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:32:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:32:53,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:53,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,386 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-07-09 17:32:53,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:53,390 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:53,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:53,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:53,420 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-07-09 17:32:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936723209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:53,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277022053] [2021-07-09 17:32:53,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:53,475 INFO L87 Difference]: Start difference. First operand 374 states and 1157 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:54,139 INFO L93 Difference]: Finished difference Result 547 states and 1651 transitions. [2021-07-09 17:32:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:54,141 INFO L225 Difference]: With dead ends: 547 [2021-07-09 17:32:54,141 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:32:54,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:32:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 376. [2021-07-09 17:32:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.1226666666666665) internal successors, (1171), 375 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1171 transitions. [2021-07-09 17:32:54,146 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1171 transitions. Word has length 18 [2021-07-09 17:32:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:54,146 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1171 transitions. [2021-07-09 17:32:54,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1171 transitions. [2021-07-09 17:32:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:54,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:54,146 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:54,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5331 [2021-07-09 17:32:54,347 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:54,347 INFO L82 PathProgramCache]: Analyzing trace with hash 193897062, now seen corresponding path program 161 times [2021-07-09 17:32:54,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:54,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590460909] [2021-07-09 17:32:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:54,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590460909] [2021-07-09 17:32:54,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590460909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322589864] [2021-07-09 17:32:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:54,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:54,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:54,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:54,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:54,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:54,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:54,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:32:54,660 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:32:54,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:54,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:32:54,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:54,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:54,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:54,749 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:32:54,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:54,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:54,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:32:54,768 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:54,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:54,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:32:54,804 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-07-09 17:32:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322589864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:54,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302249915] [2021-07-09 17:32:54,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:54,878 INFO L87 Difference]: Start difference. First operand 376 states and 1171 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:55,531 INFO L93 Difference]: Finished difference Result 537 states and 1622 transitions. [2021-07-09 17:32:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:55,532 INFO L225 Difference]: With dead ends: 537 [2021-07-09 17:32:55,532 INFO L226 Difference]: Without dead ends: 526 [2021-07-09 17:32:55,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-09 17:32:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2021-07-09 17:32:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.120734908136483) internal successors, (1189), 381 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1189 transitions. [2021-07-09 17:32:55,537 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1189 transitions. Word has length 18 [2021-07-09 17:32:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:55,537 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1189 transitions. [2021-07-09 17:32:55,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1189 transitions. [2021-07-09 17:32:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:55,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:55,538 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:55,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5342 [2021-07-09 17:32:55,739 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1675134932, now seen corresponding path program 162 times [2021-07-09 17:32:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:55,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911694663] [2021-07-09 17:32:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:55,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911694663] [2021-07-09 17:32:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911694663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830599501] [2021-07-09 17:32:55,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:55,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:55,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:55,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:55,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:55,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:55,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:55,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:55,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:55,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-07-09 17:32:55,972 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1370, array_2], 1=[v_prenex_1371, array_4]} [2021-07-09 17:32:55,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:55,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:55,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:55,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:56,019 INFO L628 ElimStorePlain]: treesize reduction 62, result has 51.9 percent of original size [2021-07-09 17:32:56,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:32:56,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:56,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:56,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,067 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:56,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:56,068 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:125, output treesize:38 [2021-07-09 17:32:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:56,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830599501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:56,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:32:56,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7710199] [2021-07-09 17:32:56,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:56,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:56,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:56,128 INFO L87 Difference]: Start difference. First operand 382 states and 1189 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:56,595 INFO L93 Difference]: Finished difference Result 578 states and 1733 transitions. [2021-07-09 17:32:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:56,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:56,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:56,596 INFO L225 Difference]: With dead ends: 578 [2021-07-09 17:32:56,596 INFO L226 Difference]: Without dead ends: 570 [2021-07-09 17:32:56,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-09 17:32:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 388. [2021-07-09 17:32:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1343669250645996) internal successors, (1213), 387 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1213 transitions. [2021-07-09 17:32:56,602 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1213 transitions. Word has length 18 [2021-07-09 17:32:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:56,602 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1213 transitions. [2021-07-09 17:32:56,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1213 transitions. [2021-07-09 17:32:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:56,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:56,602 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:56,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5354 [2021-07-09 17:32:56,803 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 4158916, now seen corresponding path program 163 times [2021-07-09 17:32:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:56,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966446570] [2021-07-09 17:32:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:56,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:56,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966446570] [2021-07-09 17:32:56,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966446570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547675142] [2021-07-09 17:32:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:56,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:56,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:56,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:56,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:56,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:56,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:56,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-07-09 17:32:57,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:57,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:57,068 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:32:57,069 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:57,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:57,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:32:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547675142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:57,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:32:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513428403] [2021-07-09 17:32:57,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:32:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:32:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:32:57,088 INFO L87 Difference]: Start difference. First operand 388 states and 1213 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:57,429 INFO L93 Difference]: Finished difference Result 536 states and 1614 transitions. [2021-07-09 17:32:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:57,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:57,430 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:32:57,431 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:32:57,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:32:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 376. [2021-07-09 17:32:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.1226666666666665) internal successors, (1171), 375 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1171 transitions. [2021-07-09 17:32:57,435 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1171 transitions. Word has length 18 [2021-07-09 17:32:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:57,435 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1171 transitions. [2021-07-09 17:32:57,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1171 transitions. [2021-07-09 17:32:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:57,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:57,436 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5363,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,637 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1103680126, now seen corresponding path program 164 times [2021-07-09 17:32:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:57,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199519738] [2021-07-09 17:32:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:57,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:57,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199519738] [2021-07-09 17:32:57,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199519738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093408376] [2021-07-09 17:32:57,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:57,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:57,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:57,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:57,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:57,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:32:57,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-07-09 17:32:57,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:57,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:57,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:57,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:32:57,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,012 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.5 percent of original size [2021-07-09 17:32:58,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:58,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:58,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,038 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:32:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:58,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:58,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:32:58,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:58,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:58,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:58,072 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-07-09 17:32:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093408376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:58,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:58,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560382685] [2021-07-09 17:32:58,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:58,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:58,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:58,130 INFO L87 Difference]: Start difference. First operand 376 states and 1171 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:58,932 INFO L93 Difference]: Finished difference Result 587 states and 1767 transitions. [2021-07-09 17:32:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:58,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:32:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:58,933 INFO L225 Difference]: With dead ends: 587 [2021-07-09 17:32:58,934 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:32:58,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:32:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 377. [2021-07-09 17:32:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.1356382978723403) internal successors, (1179), 376 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1179 transitions. [2021-07-09 17:32:58,939 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1179 transitions. Word has length 18 [2021-07-09 17:32:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:58,939 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1179 transitions. [2021-07-09 17:32:58,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1179 transitions. [2021-07-09 17:32:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:32:58,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:58,940 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:59,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5372 [2021-07-09 17:32:59,152 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1115191326, now seen corresponding path program 165 times [2021-07-09 17:32:59,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:59,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721636114] [2021-07-09 17:32:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:59,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:59,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721636114] [2021-07-09 17:32:59,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721636114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:59,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526136573] [2021-07-09 17:32:59,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:59,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:32:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:32:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:59,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:32:59,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:32:59,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:59,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:59,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:32:59,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,705 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:32:59,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:32:59,709 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-07-09 17:32:59,885 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:32:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:32:59,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:32:59,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,910 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:32:59,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:32:59,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:32:59,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:59,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:59,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:59,918 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:32:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:59,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526136573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:59,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:59,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:32:59,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952322282] [2021-07-09 17:32:59,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:32:59,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:59,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:32:59,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:32:59,945 INFO L87 Difference]: Start difference. First operand 377 states and 1179 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,456 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-07-09 17:33:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:00,871 INFO L93 Difference]: Finished difference Result 584 states and 1727 transitions. [2021-07-09 17:33:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:00,872 INFO L225 Difference]: With dead ends: 584 [2021-07-09 17:33:00,872 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:33:00,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1031.9ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:33:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 380. [2021-07-09 17:33:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.129287598944591) internal successors, (1186), 379 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1186 transitions. [2021-07-09 17:33:00,878 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1186 transitions. Word has length 18 [2021-07-09 17:33:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:00,878 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1186 transitions. [2021-07-09 17:33:00,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1186 transitions. [2021-07-09 17:33:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:00,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:00,878 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:01,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5385 [2021-07-09 17:33:01,079 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -833875028, now seen corresponding path program 166 times [2021-07-09 17:33:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:01,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900690088] [2021-07-09 17:33:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:01,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900690088] [2021-07-09 17:33:01,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900690088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142330910] [2021-07-09 17:33:01,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:01,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:01,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:01,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:01,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:01,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:01,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:01,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:01,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,545 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:33:01,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:01,549 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-07-09 17:33:01,762 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:33:01,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:01,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:01,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:01,787 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:33:01,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:01,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:01,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:01,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:01,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:01,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:33:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142330910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:01,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:01,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015709957] [2021-07-09 17:33:01,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:01,817 INFO L87 Difference]: Start difference. First operand 380 states and 1186 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:02,667 INFO L93 Difference]: Finished difference Result 587 states and 1756 transitions. [2021-07-09 17:33:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:02,668 INFO L225 Difference]: With dead ends: 587 [2021-07-09 17:33:02,668 INFO L226 Difference]: Without dead ends: 581 [2021-07-09 17:33:02,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 908.9ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-07-09 17:33:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 382. [2021-07-09 17:33:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.125984251968504) internal successors, (1191), 381 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1191 transitions. [2021-07-09 17:33:02,674 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1191 transitions. Word has length 18 [2021-07-09 17:33:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:02,674 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1191 transitions. [2021-07-09 17:33:02,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1191 transitions. [2021-07-09 17:33:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:02,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:02,675 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:02,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5405,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:02,875 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:02,875 INFO L82 PathProgramCache]: Analyzing trace with hash 647362842, now seen corresponding path program 167 times [2021-07-09 17:33:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:02,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805533858] [2021-07-09 17:33:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:02,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:02,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805533858] [2021-07-09 17:33:02,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805533858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:02,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051968744] [2021-07-09 17:33:02,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:03,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:03,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:03,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:03,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:03,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:03,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:03,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,349 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:33:03,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:03,353 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-07-09 17:33:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:03,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:03,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,584 INFO L628 ElimStorePlain]: treesize reduction 79, result has 49.4 percent of original size [2021-07-09 17:33:03,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:03,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:03,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:03,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:03,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:03,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:03,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:03,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:03,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:03,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:03,682 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1395 vanished before elimination [2021-07-09 17:33:03,682 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:33:03,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:03,684 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:33:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:03,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051968744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:03,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:03,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166157566] [2021-07-09 17:33:03,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:03,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:03,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:03,748 INFO L87 Difference]: Start difference. First operand 382 states and 1191 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,547 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-07-09 17:33:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:04,671 INFO L93 Difference]: Finished difference Result 586 states and 1754 transitions. [2021-07-09 17:33:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:04,673 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:33:04,673 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:33:04,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1017.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:33:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 377. [2021-07-09 17:33:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.1356382978723403) internal successors, (1179), 376 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1179 transitions. [2021-07-09 17:33:04,679 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1179 transitions. Word has length 18 [2021-07-09 17:33:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:04,679 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1179 transitions. [2021-07-09 17:33:04,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1179 transitions. [2021-07-09 17:33:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:04,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:04,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:04,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:04,880 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1906960408, now seen corresponding path program 168 times [2021-07-09 17:33:04,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:04,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471372604] [2021-07-09 17:33:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:04,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:04,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471372604] [2021-07-09 17:33:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471372604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669069061] [2021-07-09 17:33:04,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:05,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:33:05,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:05,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:05,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:05,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:05,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:05,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:05,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:05,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:05,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,401 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:33:05,402 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:33:05,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:05,406 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:33:05,569 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:33:05,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:05,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:05,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:05,594 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:33:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:05,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:05,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:05,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:05,603 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:33:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669069061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:05,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:05,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647590029] [2021-07-09 17:33:05,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:05,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:05,625 INFO L87 Difference]: Start difference. First operand 377 states and 1179 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:06,418 INFO L93 Difference]: Finished difference Result 555 states and 1679 transitions. [2021-07-09 17:33:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:06,419 INFO L225 Difference]: With dead ends: 555 [2021-07-09 17:33:06,419 INFO L226 Difference]: Without dead ends: 549 [2021-07-09 17:33:06,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 962.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-09 17:33:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 381. [2021-07-09 17:33:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.1289473684210525) internal successors, (1189), 380 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1189 transitions. [2021-07-09 17:33:06,424 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1189 transitions. Word has length 18 [2021-07-09 17:33:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:06,424 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1189 transitions. [2021-07-09 17:33:06,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1189 transitions. [2021-07-09 17:33:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:06,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:06,425 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:06,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5447,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:06,625 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash -425722538, now seen corresponding path program 169 times [2021-07-09 17:33:06,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:06,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249188492] [2021-07-09 17:33:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:06,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:06,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249188492] [2021-07-09 17:33:06,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249188492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821158635] [2021-07-09 17:33:06,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:07,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:07,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:07,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:07,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:07,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:07,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:07,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,206 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:33:07,207 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:33:07,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:07,211 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:33:07,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:07,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:07,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,408 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-07-09 17:33:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:07,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:07,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,436 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:33:07,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:07,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:07,468 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:07,475 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:07,505 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1412 vanished before elimination [2021-07-09 17:33:07,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:07,506 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:33:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821158635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:07,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:07,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592531327] [2021-07-09 17:33:07,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:07,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:07,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:07,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:07,571 INFO L87 Difference]: Start difference. First operand 381 states and 1189 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,070 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-07-09 17:33:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:08,448 INFO L93 Difference]: Finished difference Result 528 states and 1598 transitions. [2021-07-09 17:33:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:08,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:08,449 INFO L225 Difference]: With dead ends: 528 [2021-07-09 17:33:08,449 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:33:08,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1046.5ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:33:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 379. [2021-07-09 17:33:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.132275132275132) internal successors, (1184), 378 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1184 transitions. [2021-07-09 17:33:08,454 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1184 transitions. Word has length 18 [2021-07-09 17:33:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:08,454 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1184 transitions. [2021-07-09 17:33:08,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1184 transitions. [2021-07-09 17:33:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:08,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:08,454 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:08,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5463,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,655 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1741879842, now seen corresponding path program 170 times [2021-07-09 17:33:08,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:08,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696481989] [2021-07-09 17:33:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:08,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696481989] [2021-07-09 17:33:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696481989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65069792] [2021-07-09 17:33:08,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:09,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:09,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:09,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:09,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:09,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:09,201 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:09,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:09,260 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-07-09 17:33:09,426 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:33:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:09,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:09,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:09,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:09,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:09,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:09,455 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:09,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:33:09,465 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:09,469 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:09,474 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:09,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:09,482 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,609 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-07-09 17:33:09,610 INFO L628 ElimStorePlain]: treesize reduction 109, result has 57.1 percent of original size [2021-07-09 17:33:09,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:33:09,614 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:09,618 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:09,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:09,622 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:09,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:09,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:33:09,674 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-07-09 17:33:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65069792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:09,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:09,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120148076] [2021-07-09 17:33:09,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:09,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:09,761 INFO L87 Difference]: Start difference. First operand 379 states and 1184 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,507 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2021-07-09 17:33:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,755 INFO L93 Difference]: Finished difference Result 556 states and 1682 transitions. [2021-07-09 17:33:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,756 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:33:10,756 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:33:10,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1145.4ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:33:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 374. [2021-07-09 17:33:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.1420911528150133) internal successors, (1172), 373 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1172 transitions. [2021-07-09 17:33:10,761 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1172 transitions. Word has length 18 [2021-07-09 17:33:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,761 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1172 transitions. [2021-07-09 17:33:10,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1172 transitions. [2021-07-09 17:33:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:10,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,761 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:10,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5485 [2021-07-09 17:33:10,962 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1529859260, now seen corresponding path program 171 times [2021-07-09 17:33:10,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:10,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764843011] [2021-07-09 17:33:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764843011] [2021-07-09 17:33:11,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764843011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767435850] [2021-07-09 17:33:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:11,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:33:11,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:11,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:11,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:11,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:11,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:11,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:11,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:11,180 INFO L628 ElimStorePlain]: treesize reduction 28, result has 63.2 percent of original size [2021-07-09 17:33:11,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:11,181 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-07-09 17:33:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:11,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:11,275 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:33:11,276 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:33:11,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:11,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:33:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767435850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:11,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:33:11,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566072282] [2021-07-09 17:33:11,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:11,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:11,294 INFO L87 Difference]: Start difference. First operand 374 states and 1172 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:11,694 INFO L93 Difference]: Finished difference Result 582 states and 1750 transitions. [2021-07-09 17:33:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:11,695 INFO L225 Difference]: With dead ends: 582 [2021-07-09 17:33:11,695 INFO L226 Difference]: Without dead ends: 567 [2021-07-09 17:33:11,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-09 17:33:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 378. [2021-07-09 17:33:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.1618037135278514) internal successors, (1192), 377 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1192 transitions. [2021-07-09 17:33:11,701 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1192 transitions. Word has length 18 [2021-07-09 17:33:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:11,701 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1192 transitions. [2021-07-09 17:33:11,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1192 transitions. [2021-07-09 17:33:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:11,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:11,701 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:11,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5514 [2021-07-09 17:33:11,902 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:11,902 INFO L82 PathProgramCache]: Analyzing trace with hash -673363314, now seen corresponding path program 172 times [2021-07-09 17:33:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:11,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218509531] [2021-07-09 17:33:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:12,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218509531] [2021-07-09 17:33:12,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218509531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152308141] [2021-07-09 17:33:12,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:12,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:12,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:12,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:12,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,171 INFO L628 ElimStorePlain]: treesize reduction 34, result has 63.8 percent of original size [2021-07-09 17:33:12,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:12,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:60 [2021-07-09 17:33:12,334 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1424], 1=[array_0, v_prenex_1423]} [2021-07-09 17:33:12,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:12,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:12,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:12,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,386 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:33:12,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:12,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:12,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:12,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:12,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:12,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:12,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:12,428 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1423 vanished before elimination [2021-07-09 17:33:12,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:12,429 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:33:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152308141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:12,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:12,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947274615] [2021-07-09 17:33:12,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:12,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:12,451 INFO L87 Difference]: Start difference. First operand 378 states and 1192 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,014 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-07-09 17:33:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:13,147 INFO L93 Difference]: Finished difference Result 579 states and 1746 transitions. [2021-07-09 17:33:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:13,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:13,148 INFO L225 Difference]: With dead ends: 579 [2021-07-09 17:33:13,148 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:33:13,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 638.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:33:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 381. [2021-07-09 17:33:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.168421052631579) internal successors, (1204), 380 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1204 transitions. [2021-07-09 17:33:13,153 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1204 transitions. Word has length 18 [2021-07-09 17:33:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:13,154 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1204 transitions. [2021-07-09 17:33:13,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1204 transitions. [2021-07-09 17:33:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:13,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:13,154 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:13,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5520 [2021-07-09 17:33:13,355 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:13,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1681615236, now seen corresponding path program 173 times [2021-07-09 17:33:13,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:13,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620833513] [2021-07-09 17:33:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:13,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620833513] [2021-07-09 17:33:13,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620833513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982679731] [2021-07-09 17:33:13,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:13,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:13,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:13,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:13,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:13,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:13,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,581 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.6 percent of original size [2021-07-09 17:33:13,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:13,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-07-09 17:33:13,666 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1425], 1=[array_4, v_prenex_1426]} [2021-07-09 17:33:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:13,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:33:13,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:33:13,725 INFO L628 ElimStorePlain]: treesize reduction 142, result has 34.0 percent of original size [2021-07-09 17:33:13,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:13,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:13,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:13,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:13,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:13,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:13,773 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1426 vanished before elimination [2021-07-09 17:33:13,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:13,773 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-07-09 17:33:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982679731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:13,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:33:13,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811030015] [2021-07-09 17:33:13,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:13,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:13,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:13,831 INFO L87 Difference]: Start difference. First operand 381 states and 1204 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:14,241 INFO L93 Difference]: Finished difference Result 585 states and 1770 transitions. [2021-07-09 17:33:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:14,242 INFO L225 Difference]: With dead ends: 585 [2021-07-09 17:33:14,242 INFO L226 Difference]: Without dead ends: 580 [2021-07-09 17:33:14,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-07-09 17:33:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 370. [2021-07-09 17:33:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.1571815718157183) internal successors, (1165), 369 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1165 transitions. [2021-07-09 17:33:14,247 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1165 transitions. Word has length 18 [2021-07-09 17:33:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:14,247 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1165 transitions. [2021-07-09 17:33:14,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1165 transitions. [2021-07-09 17:33:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:14,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:14,248 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:14,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5537 [2021-07-09 17:33:14,448 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash 816041682, now seen corresponding path program 174 times [2021-07-09 17:33:14,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:14,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170977962] [2021-07-09 17:33:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170977962] [2021-07-09 17:33:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170977962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357775705] [2021-07-09 17:33:14,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:33:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:14,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:14,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:14,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,698 INFO L628 ElimStorePlain]: treesize reduction 37, result has 64.1 percent of original size [2021-07-09 17:33:14,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:14,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:66 [2021-07-09 17:33:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:14,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:14,776 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:33:14,776 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:33:14,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:14,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:33:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357775705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:14,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:33:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189285853] [2021-07-09 17:33:14,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:14,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:14,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:14,794 INFO L87 Difference]: Start difference. First operand 370 states and 1165 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:15,053 INFO L93 Difference]: Finished difference Result 537 states and 1634 transitions. [2021-07-09 17:33:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:15,054 INFO L225 Difference]: With dead ends: 537 [2021-07-09 17:33:15,054 INFO L226 Difference]: Without dead ends: 526 [2021-07-09 17:33:15,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-09 17:33:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2021-07-09 17:33:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.1627296587926508) internal successors, (1205), 381 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1205 transitions. [2021-07-09 17:33:15,059 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1205 transitions. Word has length 18 [2021-07-09 17:33:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:15,059 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1205 transitions. [2021-07-09 17:33:15,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1205 transitions. [2021-07-09 17:33:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:15,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:15,060 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:15,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5550 [2021-07-09 17:33:15,260 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:15,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1123947064, now seen corresponding path program 175 times [2021-07-09 17:33:15,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:15,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129113240] [2021-07-09 17:33:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129113240] [2021-07-09 17:33:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129113240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456855572] [2021-07-09 17:33:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:15,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:15,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:15,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:15,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,494 INFO L628 ElimStorePlain]: treesize reduction 27, result has 68.2 percent of original size [2021-07-09 17:33:15,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:15,495 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-07-09 17:33:15,538 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1427, array_0], 1=[v_prenex_1428, array_4]} [2021-07-09 17:33:15,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:15,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:15,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,585 INFO L628 ElimStorePlain]: treesize reduction 78, result has 38.6 percent of original size [2021-07-09 17:33:15,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:15,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:15,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,605 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1428 vanished before elimination [2021-07-09 17:33:15,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:15,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:15,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:15,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:15,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:15,634 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-07-09 17:33:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456855572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:15,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:33:15,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562314886] [2021-07-09 17:33:15,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:33:15,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:33:15,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:33:15,710 INFO L87 Difference]: Start difference. First operand 382 states and 1205 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:15,992 INFO L93 Difference]: Finished difference Result 541 states and 1651 transitions. [2021-07-09 17:33:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:15,993 INFO L225 Difference]: With dead ends: 541 [2021-07-09 17:33:15,993 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:33:15,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:33:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 376. [2021-07-09 17:33:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.1546666666666665) internal successors, (1183), 375 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1183 transitions. [2021-07-09 17:33:15,998 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1183 transitions. Word has length 18 [2021-07-09 17:33:16,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:16,000 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1183 transitions. [2021-07-09 17:33:16,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1183 transitions. [2021-07-09 17:33:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:16,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:16,000 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:16,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5559,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,201 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1997687744, now seen corresponding path program 176 times [2021-07-09 17:33:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:16,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84666635] [2021-07-09 17:33:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84666635] [2021-07-09 17:33:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84666635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898702403] [2021-07-09 17:33:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:16,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:16,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:16,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:16,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:16,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:33:16,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-07-09 17:33:16,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:16,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:16,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:16,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,582 INFO L628 ElimStorePlain]: treesize reduction 74, result has 51.6 percent of original size [2021-07-09 17:33:16,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:16,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:16,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:16,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:16,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:16,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:16,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:16,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:16,640 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1430 vanished before elimination [2021-07-09 17:33:16,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:16,641 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-07-09 17:33:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898702403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:16,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:16,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117849920] [2021-07-09 17:33:16,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:16,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:16,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:16,703 INFO L87 Difference]: Start difference. First operand 376 states and 1183 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:17,207 INFO L93 Difference]: Finished difference Result 549 states and 1677 transitions. [2021-07-09 17:33:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:17,208 INFO L225 Difference]: With dead ends: 549 [2021-07-09 17:33:17,208 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:33:17,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:33:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 373. [2021-07-09 17:33:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.1693548387096775) internal successors, (1179), 372 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1179 transitions. [2021-07-09 17:33:17,213 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1179 transitions. Word has length 18 [2021-07-09 17:33:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:17,213 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1179 transitions. [2021-07-09 17:33:17,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1179 transitions. [2021-07-09 17:33:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:17,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:17,214 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:17,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5569,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,414 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:17,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1271693822, now seen corresponding path program 177 times [2021-07-09 17:33:17,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:17,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095342242] [2021-07-09 17:33:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095342242] [2021-07-09 17:33:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095342242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137287284] [2021-07-09 17:33:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:33:17,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:17,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:17,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:17,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:17,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:17,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:17,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:17,784 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-07-09 17:33:17,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:17,785 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-07-09 17:33:18,048 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1437], 1=[array_0, v_prenex_1436]} [2021-07-09 17:33:18,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:18,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:18,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:18,095 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-07-09 17:33:18,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:18,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:18,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:18,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:18,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:18,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:18,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:18,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:18,136 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1436 vanished before elimination [2021-07-09 17:33:18,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:18,137 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:33:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137287284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:18,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:18,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024769826] [2021-07-09 17:33:18,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:18,160 INFO L87 Difference]: Start difference. First operand 373 states and 1179 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,527 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-09 17:33:18,760 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-09 17:33:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:19,761 INFO L93 Difference]: Finished difference Result 681 states and 1992 transitions. [2021-07-09 17:33:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:19,763 INFO L225 Difference]: With dead ends: 681 [2021-07-09 17:33:19,763 INFO L226 Difference]: Without dead ends: 669 [2021-07-09 17:33:19,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1471.9ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-07-09 17:33:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 380. [2021-07-09 17:33:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.1846965699208445) internal successors, (1207), 379 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1207 transitions. [2021-07-09 17:33:19,769 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1207 transitions. Word has length 18 [2021-07-09 17:33:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:19,769 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1207 transitions. [2021-07-09 17:33:19,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1207 transitions. [2021-07-09 17:33:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:19,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:19,770 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:19,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:19,981 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1074207120, now seen corresponding path program 178 times [2021-07-09 17:33:19,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:19,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870023629] [2021-07-09 17:33:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:20,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870023629] [2021-07-09 17:33:20,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870023629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907556713] [2021-07-09 17:33:20,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:20,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:20,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:20,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:20,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:20,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:20,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:20,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,372 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-07-09 17:33:20,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:20,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-07-09 17:33:20,681 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1443], 1=[array_0, v_prenex_1442]} [2021-07-09 17:33:20,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:20,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:20,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:20,731 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-07-09 17:33:20,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:20,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:20,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:20,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:20,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:20,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:20,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:20,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:20,795 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1442 vanished before elimination [2021-07-09 17:33:20,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:20,796 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:33:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907556713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:20,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:20,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003980138] [2021-07-09 17:33:20,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:20,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:20,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:20,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:20,820 INFO L87 Difference]: Start difference. First operand 380 states and 1207 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,332 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-09 17:33:21,484 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-07-09 17:33:21,681 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-07-09 17:33:21,869 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-07-09 17:33:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:22,442 INFO L93 Difference]: Finished difference Result 634 states and 1894 transitions. [2021-07-09 17:33:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:22,444 INFO L225 Difference]: With dead ends: 634 [2021-07-09 17:33:22,444 INFO L226 Difference]: Without dead ends: 622 [2021-07-09 17:33:22,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1613.5ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:33:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-07-09 17:33:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 383. [2021-07-09 17:33:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.1910994764397906) internal successors, (1219), 382 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1219 transitions. [2021-07-09 17:33:22,450 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1219 transitions. Word has length 18 [2021-07-09 17:33:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:22,450 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1219 transitions. [2021-07-09 17:33:22,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1219 transitions. [2021-07-09 17:33:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:22,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:22,450 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:22,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5597 [2021-07-09 17:33:22,651 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash -534377150, now seen corresponding path program 179 times [2021-07-09 17:33:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:22,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802950257] [2021-07-09 17:33:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:22,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802950257] [2021-07-09 17:33:22,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802950257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886273976] [2021-07-09 17:33:22,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:22,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:22,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:22,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:33:22,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:22,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:22,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:22,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:22,893 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:22,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:22,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:33:22,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:33:23,000 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:33:23,000 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.8 percent of original size [2021-07-09 17:33:23,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:23,002 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-07-09 17:33:23,462 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-07-09 17:33:23,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:23,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:23,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:23,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:23,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:23,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:23,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:23,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:23,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:23,505 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:23,510 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:23,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:23,520 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:23,525 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:23,531 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:23,535 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,684 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 17:33:23,685 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:33:23,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:23,691 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:23,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:23,696 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:23,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:23,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:33:23,762 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:33:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:23,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886273976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:23,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:23,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150590783] [2021-07-09 17:33:23,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:23,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:23,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:23,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:23,844 INFO L87 Difference]: Start difference. First operand 383 states and 1219 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,185 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-07-09 17:33:24,438 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2021-07-09 17:33:24,761 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 119 [2021-07-09 17:33:25,084 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 114 [2021-07-09 17:33:25,318 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 81 [2021-07-09 17:33:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:25,366 INFO L93 Difference]: Finished difference Result 597 states and 1799 transitions. [2021-07-09 17:33:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:25,367 INFO L225 Difference]: With dead ends: 597 [2021-07-09 17:33:25,367 INFO L226 Difference]: Without dead ends: 584 [2021-07-09 17:33:25,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1668.0ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-09 17:33:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 385. [2021-07-09 17:33:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.1875) internal successors, (1224), 384 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1224 transitions. [2021-07-09 17:33:25,373 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1224 transitions. Word has length 18 [2021-07-09 17:33:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:25,373 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1224 transitions. [2021-07-09 17:33:25,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1224 transitions. [2021-07-09 17:33:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:25,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:25,373 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:25,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5612,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:25,574 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:25,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1739522306, now seen corresponding path program 180 times [2021-07-09 17:33:25,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:25,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555601235] [2021-07-09 17:33:25,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:25,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555601235] [2021-07-09 17:33:25,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555601235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466430761] [2021-07-09 17:33:25,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:25,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:25,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:25,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:25,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:25,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:25,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:25,989 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-07-09 17:33:25,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:25,990 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-07-09 17:33:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:26,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:26,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:26,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,325 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-07-09 17:33:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:26,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:26,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:26,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:26,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:26,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:26,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1459 vanished before elimination [2021-07-09 17:33:26,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1458 vanished before elimination [2021-07-09 17:33:26,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:26,421 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:33:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:26,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466430761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:26,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:26,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490829601] [2021-07-09 17:33:26,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:26,482 INFO L87 Difference]: Start difference. First operand 385 states and 1224 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,829 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-09 17:33:27,056 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-09 17:33:27,230 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-07-09 17:33:27,481 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2021-07-09 17:33:27,707 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-07-09 17:33:27,904 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-07-09 17:33:28,196 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-07-09 17:33:28,451 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-07-09 17:33:28,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:28,844 INFO L93 Difference]: Finished difference Result 647 states and 1923 transitions. [2021-07-09 17:33:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:28,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:28,845 INFO L225 Difference]: With dead ends: 647 [2021-07-09 17:33:28,845 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:33:28,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2328.2ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:33:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:33:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 381. [2021-07-09 17:33:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.210526315789474) internal successors, (1220), 380 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1220 transitions. [2021-07-09 17:33:28,851 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1220 transitions. Word has length 18 [2021-07-09 17:33:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:28,851 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1220 transitions. [2021-07-09 17:33:28,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1220 transitions. [2021-07-09 17:33:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:28,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:28,852 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:29,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,052 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1275381276, now seen corresponding path program 181 times [2021-07-09 17:33:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:29,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824910523] [2021-07-09 17:33:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:29,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:29,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824910523] [2021-07-09 17:33:29,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824910523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201914507] [2021-07-09 17:33:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:29,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:29,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:29,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:29,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:29,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:29,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:29,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,375 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:33:29,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:29,376 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:33:29,608 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1465], 1=[array_0, v_prenex_1464]} [2021-07-09 17:33:29,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:29,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:29,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,644 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:33:29,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:29,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:29,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,661 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:33:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:29,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:29,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:29,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:29,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:29,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:29,686 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:33:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201914507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:29,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:29,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907003670] [2021-07-09 17:33:29,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:29,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:29,706 INFO L87 Difference]: Start difference. First operand 381 states and 1220 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,421 INFO L93 Difference]: Finished difference Result 616 states and 1849 transitions. [2021-07-09 17:33:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,423 INFO L225 Difference]: With dead ends: 616 [2021-07-09 17:33:30,423 INFO L226 Difference]: Without dead ends: 611 [2021-07-09 17:33:30,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-09 17:33:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 386. [2021-07-09 17:33:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.220779220779221) internal successors, (1240), 385 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1240 transitions. [2021-07-09 17:33:30,429 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1240 transitions. Word has length 18 [2021-07-09 17:33:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,429 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1240 transitions. [2021-07-09 17:33:30,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1240 transitions. [2021-07-09 17:33:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:30,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:30,429 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:30,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5659 [2021-07-09 17:33:30,630 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2131877222, now seen corresponding path program 182 times [2021-07-09 17:33:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:30,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281696877] [2021-07-09 17:33:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281696877] [2021-07-09 17:33:30,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281696877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159208655] [2021-07-09 17:33:30,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:30,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:30,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:30,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:30,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:30,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:30,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:30,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:30,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:30,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:30,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:30,944 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:33:30,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:30,945 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:33:31,191 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1470, array_4], 1=[array_0, v_prenex_1469]} [2021-07-09 17:33:31,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:31,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:31,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:31,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:31,235 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:33:31,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:31,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:31,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:31,252 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:33:31,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:31,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:31,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:31,257 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:31,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:31,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:31,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:31,277 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:33:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159208655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:31,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330932266] [2021-07-09 17:33:31,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:31,298 INFO L87 Difference]: Start difference. First operand 386 states and 1240 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,809 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:33:32,016 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-07-09 17:33:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:32,155 INFO L93 Difference]: Finished difference Result 612 states and 1850 transitions. [2021-07-09 17:33:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:32,157 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:33:32,157 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:33:32,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 867.2ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:33:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 389. [2021-07-09 17:33:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.2268041237113403) internal successors, (1252), 388 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1252 transitions. [2021-07-09 17:33:32,163 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1252 transitions. Word has length 18 [2021-07-09 17:33:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:32,163 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1252 transitions. [2021-07-09 17:33:32,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1252 transitions. [2021-07-09 17:33:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:32,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:32,164 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:32,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5676,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,364 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 191888476, now seen corresponding path program 183 times [2021-07-09 17:33:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:32,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662751931] [2021-07-09 17:33:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:32,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:32,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662751931] [2021-07-09 17:33:32,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662751931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662180484] [2021-07-09 17:33:32,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:33:32,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:32,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:32,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:32,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:32,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:32,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,627 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:33:32,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:32,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-07-09 17:33:32,780 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:33:32,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:32,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:32,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:32,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:32,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:32,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,862 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:33:32,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:33:32,867 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:32,871 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:32,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:32,875 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:32,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:32,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:32,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:32,916 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-07-09 17:33:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:32,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662180484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:32,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:32,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688508625] [2021-07-09 17:33:32,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:32,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:32,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:32,996 INFO L87 Difference]: Start difference. First operand 389 states and 1252 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:33,822 INFO L93 Difference]: Finished difference Result 622 states and 1886 transitions. [2021-07-09 17:33:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:33,823 INFO L225 Difference]: With dead ends: 622 [2021-07-09 17:33:33,823 INFO L226 Difference]: Without dead ends: 617 [2021-07-09 17:33:33,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-07-09 17:33:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 383. [2021-07-09 17:33:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2041884816753927) internal successors, (1224), 382 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1224 transitions. [2021-07-09 17:33:33,829 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1224 transitions. Word has length 18 [2021-07-09 17:33:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:33,829 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1224 transitions. [2021-07-09 17:33:33,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1224 transitions. [2021-07-09 17:33:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:33,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:33,829 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:34,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5694 [2021-07-09 17:33:34,030 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:34,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2058487706, now seen corresponding path program 184 times [2021-07-09 17:33:34,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:34,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99378976] [2021-07-09 17:33:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:34,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:34,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99378976] [2021-07-09 17:33:34,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99378976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962016091] [2021-07-09 17:33:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:34,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:34,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:34,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:34,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:34,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:34,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:34,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,429 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:33:34,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:34,430 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:33:34,656 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1478], 1=[array_0, v_prenex_1477]} [2021-07-09 17:33:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:34,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:34,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,692 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:33:34,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:34,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:34,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,710 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:33:34,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:34,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:34,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:34,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:34,735 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:33:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:34,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962016091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:34,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142985750] [2021-07-09 17:33:34,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:34,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:34,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:34,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:34,757 INFO L87 Difference]: Start difference. First operand 383 states and 1224 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,172 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 17:33:35,449 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2021-07-09 17:33:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:35,605 INFO L93 Difference]: Finished difference Result 565 states and 1725 transitions. [2021-07-09 17:33:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:35,606 INFO L225 Difference]: With dead ends: 565 [2021-07-09 17:33:35,606 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:33:35,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 990.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:33:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 384. [2021-07-09 17:33:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.2010443864229763) internal successors, (1226), 383 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1226 transitions. [2021-07-09 17:33:35,612 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1226 transitions. Word has length 18 [2021-07-09 17:33:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:35,612 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1226 transitions. [2021-07-09 17:33:35,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1226 transitions. [2021-07-09 17:33:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:35,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:35,612 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:35,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5707 [2021-07-09 17:33:35,813 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2131860186, now seen corresponding path program 185 times [2021-07-09 17:33:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:35,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394320459] [2021-07-09 17:33:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:35,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394320459] [2021-07-09 17:33:35,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394320459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514580970] [2021-07-09 17:33:35,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:35,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:33:35,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:35,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:36,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:36,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:36,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:36,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:36,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,086 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:33:36,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:36,087 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-07-09 17:33:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:36,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:36,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:36,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:36,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:36,172 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:36,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:36,230 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-07-09 17:33:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:36,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:36,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:36,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:36,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:36,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:36,267 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-07-09 17:33:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514580970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:36,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416606265] [2021-07-09 17:33:36,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:36,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:36,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:36,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:36,365 INFO L87 Difference]: Start difference. First operand 384 states and 1226 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,168 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-07-09 17:33:37,322 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-07-09 17:33:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:37,538 INFO L93 Difference]: Finished difference Result 604 states and 1814 transitions. [2021-07-09 17:33:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:37,540 INFO L225 Difference]: With dead ends: 604 [2021-07-09 17:33:37,540 INFO L226 Difference]: Without dead ends: 593 [2021-07-09 17:33:37,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1089.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-07-09 17:33:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 383. [2021-07-09 17:33:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.212041884816754) internal successors, (1227), 382 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1227 transitions. [2021-07-09 17:33:37,545 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1227 transitions. Word has length 18 [2021-07-09 17:33:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:37,545 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1227 transitions. [2021-07-09 17:33:37,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1227 transitions. [2021-07-09 17:33:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:37,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:37,546 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:37,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5725,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:37,746 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1560198562, now seen corresponding path program 186 times [2021-07-09 17:33:37,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:37,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958108895] [2021-07-09 17:33:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:37,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958108895] [2021-07-09 17:33:37,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958108895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339209867] [2021-07-09 17:33:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:37,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:33:37,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:37,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:33:37,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:37,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:37,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:38,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:38,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:33:38,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:33:38,113 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:33:38,114 INFO L628 ElimStorePlain]: treesize reduction 59, result has 77.0 percent of original size [2021-07-09 17:33:38,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:38,115 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-07-09 17:33:38,663 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-07-09 17:33:38,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:38,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:38,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:38,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:38,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:38,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:38,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:38,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:38,704 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:38,710 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:38,715 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:38,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:38,726 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:38,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:38,737 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:38,742 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,887 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 17:33:38,887 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:33:38,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:38,892 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:38,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:38,896 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:38,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:38,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:33:38,951 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:33:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:39,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339209867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:39,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:39,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:39,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364514664] [2021-07-09 17:33:39,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:39,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:39,030 INFO L87 Difference]: Start difference. First operand 383 states and 1227 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,332 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-07-09 17:33:39,511 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-07-09 17:33:39,774 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 97 [2021-07-09 17:33:40,012 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-07-09 17:33:40,224 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-07-09 17:33:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:40,268 INFO L93 Difference]: Finished difference Result 570 states and 1742 transitions. [2021-07-09 17:33:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:40,269 INFO L225 Difference]: With dead ends: 570 [2021-07-09 17:33:40,269 INFO L226 Difference]: Without dead ends: 557 [2021-07-09 17:33:40,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1570.8ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-07-09 17:33:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 383. [2021-07-09 17:33:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2094240837696337) internal successors, (1226), 382 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1226 transitions. [2021-07-09 17:33:40,274 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1226 transitions. Word has length 18 [2021-07-09 17:33:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:40,275 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1226 transitions. [2021-07-09 17:33:40,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1226 transitions. [2021-07-09 17:33:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:40,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:40,275 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:40,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5738 [2021-07-09 17:33:40,476 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:40,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1377475410, now seen corresponding path program 187 times [2021-07-09 17:33:40,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:40,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054463820] [2021-07-09 17:33:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054463820] [2021-07-09 17:33:40,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054463820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535170983] [2021-07-09 17:33:40,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:40,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:40,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:40,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:40,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:40,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:40,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:40,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:40,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:40,821 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:33:40,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:40,822 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:33:41,077 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1498], 1=[array_0, v_prenex_1497]} [2021-07-09 17:33:41,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:41,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:41,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,113 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:33:41,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:41,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:41,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:41,131 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:33:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:41,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:41,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:41,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:41,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:41,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:41,156 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:33:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535170983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:41,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:41,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:41,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199966758] [2021-07-09 17:33:41,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:41,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:41,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:41,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:41,176 INFO L87 Difference]: Start difference. First operand 383 states and 1226 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:41,854 INFO L93 Difference]: Finished difference Result 573 states and 1745 transitions. [2021-07-09 17:33:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:41,856 INFO L225 Difference]: With dead ends: 573 [2021-07-09 17:33:41,856 INFO L226 Difference]: Without dead ends: 568 [2021-07-09 17:33:41,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 751.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-07-09 17:33:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 386. [2021-07-09 17:33:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.2155844155844155) internal successors, (1238), 385 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1238 transitions. [2021-07-09 17:33:41,861 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1238 transitions. Word has length 18 [2021-07-09 17:33:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:41,861 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1238 transitions. [2021-07-09 17:33:41,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1238 transitions. [2021-07-09 17:33:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:41,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:41,862 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:42,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5768,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:42,063 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash -562513336, now seen corresponding path program 188 times [2021-07-09 17:33:42,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:42,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420527446] [2021-07-09 17:33:42,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:42,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:42,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420527446] [2021-07-09 17:33:42,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420527446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805890576] [2021-07-09 17:33:42,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:42,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:42,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:42,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:42,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:42,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:42,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:42,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,345 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:33:42,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:42,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-07-09 17:33:42,522 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-07-09 17:33:42,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:42,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:42,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:42,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:42,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:42,610 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:33:42,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:42,613 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:42,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:42,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:33:42,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:42,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:42,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:42,658 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-07-09 17:33:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:42,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805890576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:42,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900563877] [2021-07-09 17:33:42,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:42,735 INFO L87 Difference]: Start difference. First operand 386 states and 1238 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:43,213 INFO L93 Difference]: Finished difference Result 579 states and 1769 transitions. [2021-07-09 17:33:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:43,215 INFO L225 Difference]: With dead ends: 579 [2021-07-09 17:33:43,215 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:33:43,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:33:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 383. [2021-07-09 17:33:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2094240837696337) internal successors, (1226), 382 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1226 transitions. [2021-07-09 17:33:43,220 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1226 transitions. Word has length 18 [2021-07-09 17:33:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:43,220 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1226 transitions. [2021-07-09 17:33:43,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1226 transitions. [2021-07-09 17:33:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:43,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:43,221 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:43,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5785,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:43,421 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:43,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1618750450, now seen corresponding path program 189 times [2021-07-09 17:33:43,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:43,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873389926] [2021-07-09 17:33:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:43,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873389926] [2021-07-09 17:33:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873389926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371080346] [2021-07-09 17:33:43,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:43,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:43,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:43,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:33:43,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:43,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:43,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:33:43,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:43,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:43,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:33:43,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:33:43,858 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:33:43,859 INFO L628 ElimStorePlain]: treesize reduction 59, result has 77.0 percent of original size [2021-07-09 17:33:43,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:43,860 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-07-09 17:33:44,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:33:44,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:44,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-07-09 17:33:44,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:44,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:44,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:44,055 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:44,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:44,063 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:44,066 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:44,069 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:44,073 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:44,078 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:44,082 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:44,086 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,158 INFO L628 ElimStorePlain]: treesize reduction 213, result has 29.5 percent of original size [2021-07-09 17:33:44,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:44,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:44,162 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:44,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:44,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:44,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:44,190 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:599, output treesize:67 [2021-07-09 17:33:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:44,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371080346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:44,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:44,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412542289] [2021-07-09 17:33:44,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:44,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:44,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:44,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:44,304 INFO L87 Difference]: Start difference. First operand 383 states and 1226 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,621 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-07-09 17:33:44,804 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-07-09 17:33:45,008 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-07-09 17:33:45,219 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-07-09 17:33:45,431 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-07-09 17:33:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:45,462 INFO L93 Difference]: Finished difference Result 570 states and 1737 transitions. [2021-07-09 17:33:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:33:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:45,463 INFO L225 Difference]: With dead ends: 570 [2021-07-09 17:33:45,463 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:33:45,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1282.4ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:33:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 384. [2021-07-09 17:33:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.1984334203655354) internal successors, (1225), 383 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1225 transitions. [2021-07-09 17:33:45,468 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1225 transitions. Word has length 18 [2021-07-09 17:33:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:45,468 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1225 transitions. [2021-07-09 17:33:45,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1225 transitions. [2021-07-09 17:33:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:45,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:45,469 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:45,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,669 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1865370622, now seen corresponding path program 190 times [2021-07-09 17:33:45,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:45,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540440725] [2021-07-09 17:33:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:45,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540440725] [2021-07-09 17:33:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540440725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020174149] [2021-07-09 17:33:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:45,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:45,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:45,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:45,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:45,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:45,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:45,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:45,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:45,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:33:46,000 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:125 [2021-07-09 17:33:46,307 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_0]} [2021-07-09 17:33:46,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:46,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:46,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:46,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:46,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:46,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:46,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:46,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:46,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:46,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:46,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:46,359 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:46,363 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,508 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-07-09 17:33:46,508 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.3 percent of original size [2021-07-09 17:33:46,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:33:46,513 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:33:46,518 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:46,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:33:46,521 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:46,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:33:46,581 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:395, output treesize:76 [2021-07-09 17:33:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020174149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:46,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:46,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843784052] [2021-07-09 17:33:46,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:46,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:46,668 INFO L87 Difference]: Start difference. First operand 384 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,155 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-07-09 17:33:47,437 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-07-09 17:33:47,588 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2021-07-09 17:33:47,802 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2021-07-09 17:33:47,976 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-09 17:33:48,131 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-07-09 17:33:48,271 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-07-09 17:33:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:48,398 INFO L93 Difference]: Finished difference Result 586 states and 1775 transitions. [2021-07-09 17:33:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:48,399 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:33:48,400 INFO L226 Difference]: Without dead ends: 572 [2021-07-09 17:33:48,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1718.4ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-09 17:33:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 382. [2021-07-09 17:33:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.204724409448819) internal successors, (1221), 381 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1221 transitions. [2021-07-09 17:33:48,407 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1221 transitions. Word has length 18 [2021-07-09 17:33:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:48,407 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1221 transitions. [2021-07-09 17:33:48,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1221 transitions. [2021-07-09 17:33:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:48,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:48,408 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:48,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5821,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:48,608 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1627349486, now seen corresponding path program 191 times [2021-07-09 17:33:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:48,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307486841] [2021-07-09 17:33:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:48,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:48,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307486841] [2021-07-09 17:33:48,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307486841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605627977] [2021-07-09 17:33:48,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:48,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:48,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:48,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:48,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:48,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:49,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:49,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:49,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,079 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:33:49,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:49,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-07-09 17:33:49,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:49,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:49,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:49,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:49,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:49,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:49,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:49,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:49,217 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,275 INFO L628 ElimStorePlain]: treesize reduction 114, result has 41.5 percent of original size [2021-07-09 17:33:49,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:49,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:49,278 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:49,281 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:49,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:49,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:49,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:49,312 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:250, output treesize:59 [2021-07-09 17:33:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:49,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605627977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:49,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:49,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:49,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852525331] [2021-07-09 17:33:49,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:49,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:49,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:49,467 INFO L87 Difference]: Start difference. First operand 382 states and 1221 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,011 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-07-09 17:33:50,260 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-07-09 17:33:50,539 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-07-09 17:33:50,806 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-09 17:33:51,171 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-07-09 17:33:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:51,324 INFO L93 Difference]: Finished difference Result 573 states and 1733 transitions. [2021-07-09 17:33:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:51,325 INFO L225 Difference]: With dead ends: 573 [2021-07-09 17:33:51,325 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:33:51,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2007.2ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:33:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 380. [2021-07-09 17:33:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.203166226912929) internal successors, (1214), 379 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1214 transitions. [2021-07-09 17:33:51,330 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1214 transitions. Word has length 18 [2021-07-09 17:33:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:51,330 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1214 transitions. [2021-07-09 17:33:51,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1214 transitions. [2021-07-09 17:33:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:51,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:51,331 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:51,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5837,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,532 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1710682082, now seen corresponding path program 192 times [2021-07-09 17:33:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:51,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905846722] [2021-07-09 17:33:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:51,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905846722] [2021-07-09 17:33:51,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905846722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790687094] [2021-07-09 17:33:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:51,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:51,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:51,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:51,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:51,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:51,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,871 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:33:51,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:51,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-07-09 17:33:51,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:51,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:51,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:51,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:51,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:51,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:51,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:51,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:51,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:52,013 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-07-09 17:33:52,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:52,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:52,017 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:52,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:52,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:52,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:52,050 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-07-09 17:33:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:52,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790687094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:52,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:52,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:52,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514411741] [2021-07-09 17:33:52,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:52,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:52,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:52,157 INFO L87 Difference]: Start difference. First operand 380 states and 1214 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,889 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-09 17:33:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:52,942 INFO L93 Difference]: Finished difference Result 590 states and 1797 transitions. [2021-07-09 17:33:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:52,943 INFO L225 Difference]: With dead ends: 590 [2021-07-09 17:33:52,943 INFO L226 Difference]: Without dead ends: 584 [2021-07-09 17:33:52,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 848.3ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-09 17:33:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 379. [2021-07-09 17:33:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.2037037037037037) internal successors, (1211), 378 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1211 transitions. [2021-07-09 17:33:52,948 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1211 transitions. Word has length 18 [2021-07-09 17:33:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:52,948 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1211 transitions. [2021-07-09 17:33:52,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1211 transitions. [2021-07-09 17:33:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:52,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:52,949 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:53,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5850 [2021-07-09 17:33:53,150 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:53,150 INFO L82 PathProgramCache]: Analyzing trace with hash 652314188, now seen corresponding path program 193 times [2021-07-09 17:33:53,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:53,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779187215] [2021-07-09 17:33:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:53,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779187215] [2021-07-09 17:33:53,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779187215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787576494] [2021-07-09 17:33:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:53,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:53,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:53,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:53,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:53,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:53,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:53,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:53,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,690 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:33:53,690 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:33:53,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:53,694 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:33:53,868 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1514], 1=[array_0, v_prenex_1513]} [2021-07-09 17:33:53,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:53,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:53,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:53,913 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-07-09 17:33:53,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:53,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:53,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:53,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:53,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:53,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:53,953 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1513 vanished before elimination [2021-07-09 17:33:53,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:33:53,954 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:33:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787576494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:53,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:53,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117024885] [2021-07-09 17:33:53,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:53,977 INFO L87 Difference]: Start difference. First operand 379 states and 1211 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,659 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:33:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:55,263 INFO L93 Difference]: Finished difference Result 562 states and 1713 transitions. [2021-07-09 17:33:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:55,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:55,265 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:33:55,265 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:33:55,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1256.0ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:33:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 387. [2021-07-09 17:33:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.199481865284974) internal successors, (1235), 386 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1235 transitions. [2021-07-09 17:33:55,270 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1235 transitions. Word has length 18 [2021-07-09 17:33:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:55,270 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1235 transitions. [2021-07-09 17:33:55,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1235 transitions. [2021-07-09 17:33:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:55,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:55,271 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:55,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5862,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:55,471 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2133552058, now seen corresponding path program 194 times [2021-07-09 17:33:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:55,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968430769] [2021-07-09 17:33:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:55,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:55,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968430769] [2021-07-09 17:33:55,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968430769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:55,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981031648] [2021-07-09 17:33:55,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:55,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:55,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:33:55,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:55,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:55,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:55,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:55,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:55,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:55,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:55,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,111 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:33:56,112 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:33:56,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:56,116 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:33:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:56,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:56,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:56,316 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-07-09 17:33:56,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:56,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:56,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:56,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:56,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:56,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:56,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:33:56,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:56,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:56,411 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1522 vanished before elimination [2021-07-09 17:33:56,411 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1524 vanished before elimination [2021-07-09 17:33:56,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:33:56,412 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:33:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:56,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981031648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:56,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:56,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:33:56,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474816967] [2021-07-09 17:33:56,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:56,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:56,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:56,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:56,474 INFO L87 Difference]: Start difference. First operand 387 states and 1235 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,166 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 17:33:57,439 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-09 17:33:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:57,828 INFO L93 Difference]: Finished difference Result 573 states and 1735 transitions. [2021-07-09 17:33:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:33:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:57,830 INFO L225 Difference]: With dead ends: 573 [2021-07-09 17:33:57,830 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:33:57,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1370.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:33:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 388. [2021-07-09 17:33:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.2170542635658914) internal successors, (1245), 387 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1245 transitions. [2021-07-09 17:33:57,835 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1245 transitions. Word has length 18 [2021-07-09 17:33:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:57,835 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1245 transitions. [2021-07-09 17:33:57,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1245 transitions. [2021-07-09 17:33:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:33:57,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:57,836 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:58,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5882 [2021-07-09 17:33:58,036 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash 817394754, now seen corresponding path program 195 times [2021-07-09 17:33:58,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123650960] [2021-07-09 17:33:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:58,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:58,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123650960] [2021-07-09 17:33:58,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123650960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:58,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823698910] [2021-07-09 17:33:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:58,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:33:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:33:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:58,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:58,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:58,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:58,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:58,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:58,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:58,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:58,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:33:58,642 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:58,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:58,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:33:58,714 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:217, output treesize:193 [2021-07-09 17:33:58,907 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:33:58,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:58,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:58,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:33:58,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:33:58,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:33:58,932 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:33:58,937 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:33:58,941 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:33:58,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:33:58,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:33:58,956 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:58,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:33:58,961 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:58,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:33:58,965 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,123 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-09 17:33:59,124 INFO L628 ElimStorePlain]: treesize reduction 110, result has 62.7 percent of original size [2021-07-09 17:33:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:33:59,129 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:33:59,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:33:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:33:59,137 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:59,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:59,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:33:59,200 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:85 [2021-07-09 17:33:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:59,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823698910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:59,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:33:59,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980353870] [2021-07-09 17:33:59,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:59,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:59,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:59,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:59,292 INFO L87 Difference]: Start difference. First operand 388 states and 1245 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,801 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-09 17:34:00,001 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2021-07-09 17:34:00,132 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-09 17:34:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:00,263 INFO L93 Difference]: Finished difference Result 557 states and 1718 transitions. [2021-07-09 17:34:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:00,264 INFO L225 Difference]: With dead ends: 557 [2021-07-09 17:34:00,264 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:34:00,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1174.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:34:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 386. [2021-07-09 17:34:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.220779220779221) internal successors, (1240), 385 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1240 transitions. [2021-07-09 17:34:00,269 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1240 transitions. Word has length 18 [2021-07-09 17:34:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:00,269 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1240 transitions. [2021-07-09 17:34:00,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1240 transitions. [2021-07-09 17:34:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:00,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:00,270 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:00,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5904 [2021-07-09 17:34:00,470 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1095578010, now seen corresponding path program 196 times [2021-07-09 17:34:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:00,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125172098] [2021-07-09 17:34:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:00,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:00,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125172098] [2021-07-09 17:34:00,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125172098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524750881] [2021-07-09 17:34:00,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:00,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:00,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:00,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:00,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:00,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,797 INFO L628 ElimStorePlain]: treesize reduction 39, result has 64.2 percent of original size [2021-07-09 17:34:00,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:00,799 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:130, output treesize:70 [2021-07-09 17:34:00,911 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1536], 1=[array_0, v_prenex_1535]} [2021-07-09 17:34:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:00,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:00,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,947 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:34:00,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:00,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:00,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,964 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:34:00,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:00,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:00,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:00,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:00,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:00,989 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:34:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:01,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524750881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:01,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:01,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896825347] [2021-07-09 17:34:01,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:01,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:01,010 INFO L87 Difference]: Start difference. First operand 386 states and 1240 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:01,466 INFO L93 Difference]: Finished difference Result 565 states and 1734 transitions. [2021-07-09 17:34:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:01,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:01,467 INFO L225 Difference]: With dead ends: 565 [2021-07-09 17:34:01,467 INFO L226 Difference]: Without dead ends: 549 [2021-07-09 17:34:01,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-09 17:34:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 398. [2021-07-09 17:34:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.2241813602015115) internal successors, (1280), 397 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1280 transitions. [2021-07-09 17:34:01,472 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1280 transitions. Word has length 18 [2021-07-09 17:34:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:01,472 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1280 transitions. [2021-07-09 17:34:01,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1280 transitions. [2021-07-09 17:34:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:01,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:01,473 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:01,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5940,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:01,680 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash 385659860, now seen corresponding path program 197 times [2021-07-09 17:34:01,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:01,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618379339] [2021-07-09 17:34:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:01,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618379339] [2021-07-09 17:34:01,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618379339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895033000] [2021-07-09 17:34:01,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:01,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:01,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:01,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:01,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:01,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:01,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:01,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:01,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:01,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:01,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:01,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:01,955 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-07-09 17:34:02,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:02,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:02,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,066 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.5 percent of original size [2021-07-09 17:34:02,066 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1539 vanished before elimination [2021-07-09 17:34:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:02,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:02,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:02,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:02,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:02,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:02,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:02,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:02,125 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-07-09 17:34:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:02,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895033000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:02,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:02,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:02,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003330397] [2021-07-09 17:34:02,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:02,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:02,184 INFO L87 Difference]: Start difference. First operand 398 states and 1280 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:02,651 INFO L93 Difference]: Finished difference Result 561 states and 1738 transitions. [2021-07-09 17:34:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:02,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:02,653 INFO L225 Difference]: With dead ends: 561 [2021-07-09 17:34:02,653 INFO L226 Difference]: Without dead ends: 548 [2021-07-09 17:34:02,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-07-09 17:34:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 398. [2021-07-09 17:34:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.2241813602015115) internal successors, (1280), 397 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1280 transitions. [2021-07-09 17:34:02,661 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1280 transitions. Word has length 18 [2021-07-09 17:34:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:02,661 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1280 transitions. [2021-07-09 17:34:02,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1280 transitions. [2021-07-09 17:34:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:02,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:02,662 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:02,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5956 [2021-07-09 17:34:02,862 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2013206684, now seen corresponding path program 198 times [2021-07-09 17:34:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:02,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055781014] [2021-07-09 17:34:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:03,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055781014] [2021-07-09 17:34:03,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055781014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686835139] [2021-07-09 17:34:03,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:34:03,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:03,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:03,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:03,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:03,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:03,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:03,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:03,166 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:03,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,281 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 17:34:03,282 INFO L628 ElimStorePlain]: treesize reduction 59, result has 78.0 percent of original size [2021-07-09 17:34:03,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:03,284 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-07-09 17:34:03,619 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-07-09 17:34:03,753 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-07-09 17:34:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:03,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:03,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:03,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:03,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:03,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:03,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:03,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:03,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:03,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:03,819 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:03,826 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:03,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:03,841 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:03,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:03,847 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:03,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:03,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,019 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 17:34:04,019 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:34:04,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:34:04,025 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:04,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:34:04,029 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:04,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:04,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:34:04,090 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:34:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686835139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:04,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969159774] [2021-07-09 17:34:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:04,181 INFO L87 Difference]: Start difference. First operand 398 states and 1280 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,666 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:34:04,950 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2021-07-09 17:34:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:05,614 INFO L93 Difference]: Finished difference Result 564 states and 1721 transitions. [2021-07-09 17:34:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:05,615 INFO L225 Difference]: With dead ends: 564 [2021-07-09 17:34:05,615 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:34:05,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1553.8ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:34:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 400. [2021-07-09 17:34:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.2205513784461153) internal successors, (1285), 399 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1285 transitions. [2021-07-09 17:34:05,621 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1285 transitions. Word has length 18 [2021-07-09 17:34:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:05,621 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1285 transitions. [2021-07-09 17:34:05,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1285 transitions. [2021-07-09 17:34:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:05,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:05,622 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:05,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5969,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:05,822 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash -584251578, now seen corresponding path program 199 times [2021-07-09 17:34:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:05,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374597399] [2021-07-09 17:34:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:06,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374597399] [2021-07-09 17:34:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374597399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385104940] [2021-07-09 17:34:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:06,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:06,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:06,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:06,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,251 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-07-09 17:34:06,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:06,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-07-09 17:34:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:06,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:06,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,538 INFO L628 ElimStorePlain]: treesize reduction 104, result has 43.5 percent of original size [2021-07-09 17:34:06,538 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:34:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:06,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,562 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1553 vanished before elimination [2021-07-09 17:34:06,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:06,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:06,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:06,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:06,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:06,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:06,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:06,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:06,631 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:198, output treesize:46 [2021-07-09 17:34:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385104940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:06,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:06,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564630680] [2021-07-09 17:34:06,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:06,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:06,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:06,709 INFO L87 Difference]: Start difference. First operand 400 states and 1285 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:07,183 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-07-09 17:34:07,369 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-07-09 17:34:07,628 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-09 17:34:08,008 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-07-09 17:34:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:08,186 INFO L93 Difference]: Finished difference Result 555 states and 1694 transitions. [2021-07-09 17:34:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:08,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:08,187 INFO L225 Difference]: With dead ends: 555 [2021-07-09 17:34:08,188 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:34:08,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1504.6ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:34:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 396. [2021-07-09 17:34:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.2177215189873416) internal successors, (1271), 395 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1271 transitions. [2021-07-09 17:34:08,193 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1271 transitions. Word has length 18 [2021-07-09 17:34:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:08,193 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1271 transitions. [2021-07-09 17:34:08,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1271 transitions. [2021-07-09 17:34:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:08,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:08,194 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:08,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5990 [2021-07-09 17:34:08,394 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash 934576270, now seen corresponding path program 200 times [2021-07-09 17:34:08,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:08,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732224291] [2021-07-09 17:34:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:08,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:08,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732224291] [2021-07-09 17:34:08,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732224291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:08,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067459282] [2021-07-09 17:34:08,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:08,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:08,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:08,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:08,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:08,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:08,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:08,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:08,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:08,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:08,763 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:34:08,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:08,765 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:34:09,011 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1561, array_4], 1=[array_0, v_prenex_1560]} [2021-07-09 17:34:09,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:09,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:09,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:09,058 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:34:09,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:09,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,075 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:34:09,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:09,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:09,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:09,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:09,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:09,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:09,101 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:34:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067459282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:09,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009944874] [2021-07-09 17:34:09,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:09,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:09,121 INFO L87 Difference]: Start difference. First operand 396 states and 1271 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:09,716 INFO L93 Difference]: Finished difference Result 543 states and 1672 transitions. [2021-07-09 17:34:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:09,718 INFO L225 Difference]: With dead ends: 543 [2021-07-09 17:34:09,718 INFO L226 Difference]: Without dead ends: 538 [2021-07-09 17:34:09,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 706.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-09 17:34:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2021-07-09 17:34:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.2236180904522613) internal successors, (1283), 398 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1283 transitions. [2021-07-09 17:34:09,723 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1283 transitions. Word has length 18 [2021-07-09 17:34:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:09,723 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1283 transitions. [2021-07-09 17:34:09,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1283 transitions. [2021-07-09 17:34:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:09,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:09,728 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:09,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6007,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:09,928 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:09,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:09,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1005412476, now seen corresponding path program 201 times [2021-07-09 17:34:09,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:09,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971864056] [2021-07-09 17:34:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:10,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:10,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971864056] [2021-07-09 17:34:10,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971864056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:10,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160169394] [2021-07-09 17:34:10,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:10,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:34:10,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:10,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:10,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:10,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:10,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,224 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-07-09 17:34:10,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:10,225 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-07-09 17:34:10,373 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:34:10,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:10,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:10,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:10,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:10,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:10,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,455 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:34:10,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:34:10,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:10,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:10,466 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:10,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:10,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:10,503 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-07-09 17:34:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:10,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160169394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:10,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:10,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:10,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119215816] [2021-07-09 17:34:10,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:10,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:10,580 INFO L87 Difference]: Start difference. First operand 399 states and 1283 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:11,164 INFO L93 Difference]: Finished difference Result 557 states and 1716 transitions. [2021-07-09 17:34:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:11,165 INFO L225 Difference]: With dead ends: 557 [2021-07-09 17:34:11,165 INFO L226 Difference]: Without dead ends: 552 [2021-07-09 17:34:11,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 604.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-07-09 17:34:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 397. [2021-07-09 17:34:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.2146464646464645) internal successors, (1273), 396 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1273 transitions. [2021-07-09 17:34:11,171 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1273 transitions. Word has length 18 [2021-07-09 17:34:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:11,171 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1273 transitions. [2021-07-09 17:34:11,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1273 transitions. [2021-07-09 17:34:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:11,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:11,172 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:11,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6025 [2021-07-09 17:34:11,372 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 119770116, now seen corresponding path program 202 times [2021-07-09 17:34:11,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:11,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462568987] [2021-07-09 17:34:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:11,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:11,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462568987] [2021-07-09 17:34:11,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462568987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:11,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458718237] [2021-07-09 17:34:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:11,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:11,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:11,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:11,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:11,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:11,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:11,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:11,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:11,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,760 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-07-09 17:34:11,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:11,761 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:34:11,893 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1568], 1=[array_0, v_prenex_1567]} [2021-07-09 17:34:11,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:11,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:11,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:11,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,948 INFO L628 ElimStorePlain]: treesize reduction 69, result has 48.1 percent of original size [2021-07-09 17:34:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:11,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:11,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:11,973 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:34:11,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:11,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:11,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:11,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:11,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:12,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:12,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:12,006 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:154, output treesize:53 [2021-07-09 17:34:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:12,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458718237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:12,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:12,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:12,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667098031] [2021-07-09 17:34:12,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:12,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:12,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:12,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:12,071 INFO L87 Difference]: Start difference. First operand 397 states and 1273 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,490 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-09 17:34:12,753 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-07-09 17:34:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:12,905 INFO L93 Difference]: Finished difference Result 534 states and 1648 transitions. [2021-07-09 17:34:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:12,906 INFO L225 Difference]: With dead ends: 534 [2021-07-09 17:34:12,906 INFO L226 Difference]: Without dead ends: 528 [2021-07-09 17:34:12,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-09 17:34:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 396. [2021-07-09 17:34:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.2177215189873416) internal successors, (1271), 395 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1271 transitions. [2021-07-09 17:34:12,911 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1271 transitions. Word has length 18 [2021-07-09 17:34:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:12,911 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1271 transitions. [2021-07-09 17:34:12,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1271 transitions. [2021-07-09 17:34:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:12,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:12,912 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:13,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6038,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,112 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2110473790, now seen corresponding path program 203 times [2021-07-09 17:34:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:13,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89164057] [2021-07-09 17:34:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:13,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:13,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89164057] [2021-07-09 17:34:13,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89164057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730356714] [2021-07-09 17:34:13,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:13,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:13,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:13,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:13,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:13,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:13,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:13,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:149, output treesize:137 [2021-07-09 17:34:13,634 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:34:13,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:13,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:13,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:13,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:13,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:13,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:13,662 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:13,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:13,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:13,681 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:13,684 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,827 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-07-09 17:34:13,828 INFO L628 ElimStorePlain]: treesize reduction 93, result has 63.7 percent of original size [2021-07-09 17:34:13,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:34:13,832 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:34:13,837 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:13,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:34:13,841 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:13,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:13,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:34:13,904 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:385, output treesize:90 [2021-07-09 17:34:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:14,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730356714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:14,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:14,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:14,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895046421] [2021-07-09 17:34:14,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:14,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:14,031 INFO L87 Difference]: Start difference. First operand 396 states and 1271 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:14,664 INFO L93 Difference]: Finished difference Result 550 states and 1696 transitions. [2021-07-09 17:34:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:14,666 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:34:14,666 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:34:14,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:34:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 394. [2021-07-09 17:34:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.2213740458015265) internal successors, (1266), 393 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1266 transitions. [2021-07-09 17:34:14,674 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1266 transitions. Word has length 18 [2021-07-09 17:34:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:14,675 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1266 transitions. [2021-07-09 17:34:14,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1266 transitions. [2021-07-09 17:34:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:14,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:14,675 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:14,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6051,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:14,892 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -703930412, now seen corresponding path program 204 times [2021-07-09 17:34:14,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:14,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016161567] [2021-07-09 17:34:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:15,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:15,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016161567] [2021-07-09 17:34:15,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016161567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436739457] [2021-07-09 17:34:15,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:15,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:34:15,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:15,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:15,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:15,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:15,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:15,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:15,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:15,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,337 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:34:15,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:15,338 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:34:15,412 INFO L446 ElimStorePlain]: Different costs {0=[array_0, array_4], 1=[v_prenex_1572, v_prenex_1574, v_prenex_1573, v_prenex_1576, v_prenex_1575, v_prenex_1577]} [2021-07-09 17:34:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:15,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,499 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-07-09 17:34:15,499 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:34:15,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:15,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,549 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2021-07-09 17:34:15,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:15,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:15,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:15,578 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1573 vanished before elimination [2021-07-09 17:34:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:15,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:15,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:15,608 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:15,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:15,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:15,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:15,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1577 vanished before elimination [2021-07-09 17:34:15,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:15,640 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-07-09 17:34:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:15,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436739457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:15,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58184274] [2021-07-09 17:34:15,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:15,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:15,749 INFO L87 Difference]: Start difference. First operand 394 states and 1266 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-09 17:34:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:16,700 INFO L93 Difference]: Finished difference Result 609 states and 1849 transitions. [2021-07-09 17:34:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:16,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:16,701 INFO L225 Difference]: With dead ends: 609 [2021-07-09 17:34:16,701 INFO L226 Difference]: Without dead ends: 604 [2021-07-09 17:34:16,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-09 17:34:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 395. [2021-07-09 17:34:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.220812182741117) internal successors, (1269), 394 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1269 transitions. [2021-07-09 17:34:16,707 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1269 transitions. Word has length 18 [2021-07-09 17:34:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:16,707 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1269 transitions. [2021-07-09 17:34:16,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1269 transitions. [2021-07-09 17:34:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:16,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:16,708 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:16,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6081 [2021-07-09 17:34:16,914 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash 657625694, now seen corresponding path program 205 times [2021-07-09 17:34:16,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:16,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410973919] [2021-07-09 17:34:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:17,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410973919] [2021-07-09 17:34:17,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410973919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464921817] [2021-07-09 17:34:17,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:17,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:17,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:17,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:17,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:17,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:17,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:17,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,318 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-07-09 17:34:17,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:17,319 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:34:17,393 INFO L446 ElimStorePlain]: Different costs {0=[array_0, array_4], 1=[v_prenex_1581, v_prenex_1580, v_prenex_1583, v_prenex_1582, v_prenex_1578, v_prenex_1579]} [2021-07-09 17:34:17,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:17,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,479 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-07-09 17:34:17,479 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:34:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:17,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,529 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2021-07-09 17:34:17,530 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1580 vanished before elimination [2021-07-09 17:34:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:17,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,554 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1582 vanished before elimination [2021-07-09 17:34:17,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:17,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:17,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:17,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:17,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:17,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:17,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:17,628 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-07-09 17:34:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464921817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:17,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:17,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761703273] [2021-07-09 17:34:17,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:17,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:17,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:17,733 INFO L87 Difference]: Start difference. First operand 395 states and 1269 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,076 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-07-09 17:34:18,380 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-07-09 17:34:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:18,444 INFO L93 Difference]: Finished difference Result 536 states and 1653 transitions. [2021-07-09 17:34:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:18,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:18,445 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:34:18,445 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:34:18,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 811.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:34:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-07-09 17:34:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.209718670076726) internal successors, (1255), 391 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1255 transitions. [2021-07-09 17:34:18,450 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1255 transitions. Word has length 18 [2021-07-09 17:34:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:18,450 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1255 transitions. [2021-07-09 17:34:18,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1255 transitions. [2021-07-09 17:34:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:18,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:18,451 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:18,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6098,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:18,651 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:18,651 INFO L82 PathProgramCache]: Analyzing trace with hash -187420450, now seen corresponding path program 206 times [2021-07-09 17:34:18,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:18,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782719682] [2021-07-09 17:34:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:18,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782719682] [2021-07-09 17:34:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782719682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735267899] [2021-07-09 17:34:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:18,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:18,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:18,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:18,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:18,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:18,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:18,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:18,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:18,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:18,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:19,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:19,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-07-09 17:34:19,343 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-07-09 17:34:19,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:19,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:19,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:19,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:19,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:19,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:19,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:19,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:19,382 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:19,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:19,392 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:19,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:19,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,558 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 17:34:19,558 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.3 percent of original size [2021-07-09 17:34:19,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:34:19,563 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:19,567 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:19,571 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:19,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:19,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:34:19,632 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:405, output treesize:77 [2021-07-09 17:34:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:19,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735267899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:19,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:19,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162384772] [2021-07-09 17:34:19,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:19,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:19,732 INFO L87 Difference]: Start difference. First operand 392 states and 1255 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,220 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:34:20,447 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2021-07-09 17:34:20,701 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-09 17:34:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:21,146 INFO L93 Difference]: Finished difference Result 579 states and 1760 transitions. [2021-07-09 17:34:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:21,147 INFO L225 Difference]: With dead ends: 579 [2021-07-09 17:34:21,147 INFO L226 Difference]: Without dead ends: 563 [2021-07-09 17:34:21,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1447.8ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-09 17:34:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 401. [2021-07-09 17:34:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.2125) internal successors, (1285), 400 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1285 transitions. [2021-07-09 17:34:21,154 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1285 transitions. Word has length 18 [2021-07-09 17:34:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:21,154 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1285 transitions. [2021-07-09 17:34:21,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1285 transitions. [2021-07-09 17:34:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:21,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:21,155 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:21,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6115,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:21,365 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -932373022, now seen corresponding path program 207 times [2021-07-09 17:34:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:21,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731039452] [2021-07-09 17:34:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:21,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:21,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731039452] [2021-07-09 17:34:21,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731039452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:21,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575588760] [2021-07-09 17:34:21,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:21,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:34:21,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:21,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:21,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:21,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:21,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:21,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:21,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:21,734 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:21,820 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:34:21,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:21,821 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:34:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:22,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:22,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,154 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-07-09 17:34:22,154 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:34:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:22,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:22,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:22,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:22,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:34:22,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:34:22,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:22,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:22,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:22,251 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1601 vanished before elimination [2021-07-09 17:34:22,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:22,253 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:34:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:22,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575588760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:22,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:22,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:22,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003296736] [2021-07-09 17:34:22,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:22,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:22,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:22,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:22,316 INFO L87 Difference]: Start difference. First operand 401 states and 1285 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,760 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-07-09 17:34:23,045 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2021-07-09 17:34:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:23,600 INFO L93 Difference]: Finished difference Result 615 states and 1856 transitions. [2021-07-09 17:34:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:23,601 INFO L225 Difference]: With dead ends: 615 [2021-07-09 17:34:23,601 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:34:23,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1361.6ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:34:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-07-09 17:34:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.2388059701492535) internal successors, (1302), 402 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1302 transitions. [2021-07-09 17:34:23,610 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1302 transitions. Word has length 18 [2021-07-09 17:34:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:23,610 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1302 transitions. [2021-07-09 17:34:23,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1302 transitions. [2021-07-09 17:34:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:23,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:23,611 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:23,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6133 [2021-07-09 17:34:23,811 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1141669252, now seen corresponding path program 208 times [2021-07-09 17:34:23,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:23,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186389471] [2021-07-09 17:34:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:23,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186389471] [2021-07-09 17:34:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186389471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501305860] [2021-07-09 17:34:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:23,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:24,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:24,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:24,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:24,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:24,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,093 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-07-09 17:34:24,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:24,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-07-09 17:34:24,235 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:34:24,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:24,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:24,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:24,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:24,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:24,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:24,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:24,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,325 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-07-09 17:34:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:24,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:24,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:24,332 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:24,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:24,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:24,359 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-07-09 17:34:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501305860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:24,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:24,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038820762] [2021-07-09 17:34:24,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:24,415 INFO L87 Difference]: Start difference. First operand 403 states and 1302 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:25,373 INFO L93 Difference]: Finished difference Result 660 states and 2026 transitions. [2021-07-09 17:34:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:34:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:25,374 INFO L225 Difference]: With dead ends: 660 [2021-07-09 17:34:25,374 INFO L226 Difference]: Without dead ends: 655 [2021-07-09 17:34:25,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 843.6ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-09 17:34:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 403. [2021-07-09 17:34:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.2388059701492535) internal successors, (1302), 402 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1302 transitions. [2021-07-09 17:34:25,380 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1302 transitions. Word has length 18 [2021-07-09 17:34:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:25,380 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1302 transitions. [2021-07-09 17:34:25,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1302 transitions. [2021-07-09 17:34:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:25,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:25,381 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:25,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6156 [2021-07-09 17:34:25,582 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash -922333774, now seen corresponding path program 209 times [2021-07-09 17:34:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128125150] [2021-07-09 17:34:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:25,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:25,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128125150] [2021-07-09 17:34:25,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128125150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:25,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080532480] [2021-07-09 17:34:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:25,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:25,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:25,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:25,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:25,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:25,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:25,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:25,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:25,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:25,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:25,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-07-09 17:34:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:26,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:26,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:26,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:26,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:26,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:26,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:26,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:26,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:26,079 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:26,082 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,149 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-07-09 17:34:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:26,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:26,155 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:26,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:26,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:26,182 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-07-09 17:34:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:26,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080532480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:26,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:26,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047060362] [2021-07-09 17:34:26,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:26,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:26,337 INFO L87 Difference]: Start difference. First operand 403 states and 1302 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:26,779 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:34:27,074 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:34:27,214 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-09 17:34:27,455 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-07-09 17:34:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:27,599 INFO L93 Difference]: Finished difference Result 559 states and 1714 transitions. [2021-07-09 17:34:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:27,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:27,600 INFO L225 Difference]: With dead ends: 559 [2021-07-09 17:34:27,601 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:34:27,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1356.0ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:34:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 402. [2021-07-09 17:34:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.2369077306733165) internal successors, (1298), 401 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1298 transitions. [2021-07-09 17:34:27,606 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1298 transitions. Word has length 18 [2021-07-09 17:34:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:27,606 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1298 transitions. [2021-07-09 17:34:27,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1298 transitions. [2021-07-09 17:34:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:27,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:27,606 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:27,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6169 [2021-07-09 17:34:27,813 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:27,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1484252764, now seen corresponding path program 210 times [2021-07-09 17:34:27,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:27,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410432984] [2021-07-09 17:34:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:27,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410432984] [2021-07-09 17:34:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410432984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771083212] [2021-07-09 17:34:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:27,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:34:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:27,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:28,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:28,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:28,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:28,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:28,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,130 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-07-09 17:34:28,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:28,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-07-09 17:34:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:28,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:28,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:28,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:28,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:28,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:28,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:28,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:28,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:28,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:28,209 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,275 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-07-09 17:34:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:28,278 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:28,281 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:28,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:28,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:28,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:28,311 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-07-09 17:34:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771083212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:28,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:28,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738568496] [2021-07-09 17:34:28,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:28,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:28,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:28,415 INFO L87 Difference]: Start difference. First operand 402 states and 1298 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:28,855 INFO L93 Difference]: Finished difference Result 559 states and 1724 transitions. [2021-07-09 17:34:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:28,857 INFO L225 Difference]: With dead ends: 559 [2021-07-09 17:34:28,857 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:34:28,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:34:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 403. [2021-07-09 17:34:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.236318407960199) internal successors, (1301), 402 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1301 transitions. [2021-07-09 17:34:28,862 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1301 transitions. Word has length 18 [2021-07-09 17:34:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:28,862 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1301 transitions. [2021-07-09 17:34:28,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1301 transitions. [2021-07-09 17:34:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:28,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:28,863 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:29,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6183,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:29,063 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1449158426, now seen corresponding path program 211 times [2021-07-09 17:34:29,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:29,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382651695] [2021-07-09 17:34:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382651695] [2021-07-09 17:34:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382651695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056116706] [2021-07-09 17:34:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:29,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:29,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:29,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:29,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:29,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:29,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,413 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-07-09 17:34:29,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:29,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-07-09 17:34:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:29,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:29,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:29,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:29,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:29,478 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:29,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:29,486 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:29,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:29,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:29,493 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,563 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-07-09 17:34:29,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:29,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:29,567 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:29,569 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:29,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:29,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:29,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:29,600 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-07-09 17:34:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056116706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:29,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50272430] [2021-07-09 17:34:29,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:29,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:29,710 INFO L87 Difference]: Start difference. First operand 403 states and 1301 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,163 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-09 17:34:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:30,217 INFO L93 Difference]: Finished difference Result 542 states and 1681 transitions. [2021-07-09 17:34:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:30,218 INFO L225 Difference]: With dead ends: 542 [2021-07-09 17:34:30,218 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:34:30,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:34:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:34:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 401. [2021-07-09 17:34:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.2275) internal successors, (1291), 400 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1291 transitions. [2021-07-09 17:34:30,223 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1291 transitions. Word has length 18 [2021-07-09 17:34:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:30,223 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1291 transitions. [2021-07-09 17:34:30,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1291 transitions. [2021-07-09 17:34:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:30,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:30,224 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:30,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6196 [2021-07-09 17:34:30,425 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1050481716, now seen corresponding path program 212 times [2021-07-09 17:34:30,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:30,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479512542] [2021-07-09 17:34:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:30,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:30,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479512542] [2021-07-09 17:34:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479512542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:30,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358806311] [2021-07-09 17:34:30,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:30,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:30,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:30,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:30,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:30,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:30,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:30,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:30,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-07-09 17:34:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:30,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:30,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:30,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:30,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:30,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:30,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:30,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:30,899 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:30,903 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:30,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,969 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-07-09 17:34:30,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:30,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:30,973 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:30,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:30,975 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:31,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:31,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:31,003 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-07-09 17:34:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358806311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:31,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907358950] [2021-07-09 17:34:31,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:31,118 INFO L87 Difference]: Start difference. First operand 401 states and 1291 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:31,841 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-09 17:34:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:32,197 INFO L93 Difference]: Finished difference Result 608 states and 1875 transitions. [2021-07-09 17:34:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:32,198 INFO L225 Difference]: With dead ends: 608 [2021-07-09 17:34:32,198 INFO L226 Difference]: Without dead ends: 602 [2021-07-09 17:34:32,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1115.6ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-07-09 17:34:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 400. [2021-07-09 17:34:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.230576441102757) internal successors, (1289), 399 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1289 transitions. [2021-07-09 17:34:32,203 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1289 transitions. Word has length 18 [2021-07-09 17:34:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:32,203 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1289 transitions. [2021-07-09 17:34:32,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1289 transitions. [2021-07-09 17:34:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:32,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:32,204 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:32,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6209,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:32,405 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2097338382, now seen corresponding path program 213 times [2021-07-09 17:34:32,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:32,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434905585] [2021-07-09 17:34:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:32,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:32,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434905585] [2021-07-09 17:34:32,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434905585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002122143] [2021-07-09 17:34:32,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:32,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:34:32,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:32,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:32,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:32,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:32,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:32,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:32,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:32,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:32,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:32,922 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:34:32,923 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:34:32,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:34:32,927 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:34:33,084 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:34:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:33,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:33,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:33,112 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:34:33,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:33,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:33,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:33,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:33,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:33,121 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:34:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:33,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002122143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:33,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:33,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:33,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989950155] [2021-07-09 17:34:33,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:33,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:33,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:33,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:33,142 INFO L87 Difference]: Start difference. First operand 400 states and 1289 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,734 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-07-09 17:34:33,863 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-07-09 17:34:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:33,972 INFO L93 Difference]: Finished difference Result 569 states and 1747 transitions. [2021-07-09 17:34:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:33,973 INFO L225 Difference]: With dead ends: 569 [2021-07-09 17:34:33,973 INFO L226 Difference]: Without dead ends: 563 [2021-07-09 17:34:33,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-09 17:34:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 406. [2021-07-09 17:34:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.219753086419753) internal successors, (1304), 405 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1304 transitions. [2021-07-09 17:34:33,978 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1304 transitions. Word has length 18 [2021-07-09 17:34:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:33,978 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1304 transitions. [2021-07-09 17:34:33,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1304 transitions. [2021-07-09 17:34:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:33,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:33,979 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:34,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6224 [2021-07-09 17:34:34,180 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:34,180 INFO L82 PathProgramCache]: Analyzing trace with hash -716391044, now seen corresponding path program 214 times [2021-07-09 17:34:34,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:34,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925712753] [2021-07-09 17:34:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925712753] [2021-07-09 17:34:34,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925712753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043319197] [2021-07-09 17:34:34,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:34,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:34,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:34,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:34,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:34,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:34,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:34,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:34,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:34,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,697 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:34:34,697 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:34:34,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:34:34,701 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:34:34,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:34,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:34,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,887 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-07-09 17:34:34,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:34,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:34,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:34,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1618 vanished before elimination [2021-07-09 17:34:34,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:34,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:34,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:34,947 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:34,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1620 vanished before elimination [2021-07-09 17:34:34,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:34,977 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:34:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043319197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:35,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:35,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:35,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124073678] [2021-07-09 17:34:35,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:35,033 INFO L87 Difference]: Start difference. First operand 406 states and 1304 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,648 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-07-09 17:34:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:35,881 INFO L93 Difference]: Finished difference Result 568 states and 1745 transitions. [2021-07-09 17:34:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:35,882 INFO L225 Difference]: With dead ends: 568 [2021-07-09 17:34:35,882 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:34:35,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:34:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:34:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 404. [2021-07-09 17:34:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.2233250620347396) internal successors, (1299), 403 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1299 transitions. [2021-07-09 17:34:35,888 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1299 transitions. Word has length 18 [2021-07-09 17:34:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:35,888 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1299 transitions. [2021-07-09 17:34:35,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1299 transitions. [2021-07-09 17:34:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:35,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:35,888 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:36,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6240 [2021-07-09 17:34:36,093 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2032548348, now seen corresponding path program 215 times [2021-07-09 17:34:36,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:36,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035362926] [2021-07-09 17:34:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:36,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:36,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035362926] [2021-07-09 17:34:36,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035362926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:36,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549435839] [2021-07-09 17:34:36,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:36,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:36,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:36,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:36,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:36,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:36,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:36,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:36,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:36,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:36,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:36,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:36,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:34:36,681 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-07-09 17:34:36,864 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:34:36,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:36,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:36,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:36,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:36,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:36,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:36,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:36,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:36,904 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:36,909 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:36,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:36,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:36,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:36,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:36,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,055 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-09 17:34:37,056 INFO L628 ElimStorePlain]: treesize reduction 95, result has 60.4 percent of original size [2021-07-09 17:34:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:37,060 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:34:37,064 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:37,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:37,068 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:37,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:34:37,120 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-07-09 17:34:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:37,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549435839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:37,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:37,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:37,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667300426] [2021-07-09 17:34:37,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:37,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:37,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:37,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:37,204 INFO L87 Difference]: Start difference. First operand 404 states and 1299 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,900 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2021-07-09 17:34:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:38,144 INFO L93 Difference]: Finished difference Result 570 states and 1750 transitions. [2021-07-09 17:34:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:38,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:38,145 INFO L225 Difference]: With dead ends: 570 [2021-07-09 17:34:38,145 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:34:38,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1042.6ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:34:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 402. [2021-07-09 17:34:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.226932668329177) internal successors, (1294), 401 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1294 transitions. [2021-07-09 17:34:38,151 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1294 transitions. Word has length 18 [2021-07-09 17:34:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:38,151 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1294 transitions. [2021-07-09 17:34:38,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1294 transitions. [2021-07-09 17:34:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:38,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:38,152 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:38,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6258,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:38,357 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1727189146, now seen corresponding path program 216 times [2021-07-09 17:34:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:38,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321481721] [2021-07-09 17:34:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:38,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321481721] [2021-07-09 17:34:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321481721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117427872] [2021-07-09 17:34:38,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:38,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:38,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:38,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:38,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:38,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:38,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:38,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:38,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:38,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:38,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:38,754 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 17:34:38,754 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.9 percent of original size [2021-07-09 17:34:38,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:34:38,761 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:247, output treesize:219 [2021-07-09 17:34:39,010 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-07-09 17:34:39,078 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-07-09 17:34:39,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:39,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:39,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:39,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:39,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:39,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:39,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:39,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:39,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:39,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:34:39,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:39,137 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:39,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:34:39,157 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:39,163 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:39,168 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,363 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2021-07-09 17:34:39,364 INFO L628 ElimStorePlain]: treesize reduction 258, result has 43.4 percent of original size [2021-07-09 17:34:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:39,369 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:39,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:39,373 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:39,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:39,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:34:39,455 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:659, output treesize:116 [2021-07-09 17:34:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117427872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:39,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:39,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598363766] [2021-07-09 17:34:39,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:39,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:39,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:39,604 INFO L87 Difference]: Start difference. First operand 402 states and 1294 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,216 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-07-09 17:34:40,377 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-09 17:34:40,699 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-07-09 17:34:40,931 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2021-07-09 17:34:41,211 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-07-09 17:34:41,430 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-07-09 17:34:41,672 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2021-07-09 17:34:41,947 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-07-09 17:34:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:42,061 INFO L93 Difference]: Finished difference Result 694 states and 2070 transitions. [2021-07-09 17:34:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:42,063 INFO L225 Difference]: With dead ends: 694 [2021-07-09 17:34:42,063 INFO L226 Difference]: Without dead ends: 676 [2021-07-09 17:34:42,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2263.1ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-09 17:34:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 408. [2021-07-09 17:34:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.2457002457002457) internal successors, (1321), 407 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1321 transitions. [2021-07-09 17:34:42,069 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1321 transitions. Word has length 18 [2021-07-09 17:34:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:42,069 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1321 transitions. [2021-07-09 17:34:42,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1321 transitions. [2021-07-09 17:34:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:42,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:42,070 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:42,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6296 [2021-07-09 17:34:42,270 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228754, now seen corresponding path program 217 times [2021-07-09 17:34:42,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:42,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846481440] [2021-07-09 17:34:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:42,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:42,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846481440] [2021-07-09 17:34:42,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846481440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903100667] [2021-07-09 17:34:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:42,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:42,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:42,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:42,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:42,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,523 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-07-09 17:34:42,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:42,524 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-07-09 17:34:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:42,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:42,601 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:34:42,601 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:34:42,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:42,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:34:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:42,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903100667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:42,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:34:42,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839998305] [2021-07-09 17:34:42,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:42,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:42,621 INFO L87 Difference]: Start difference. First operand 408 states and 1321 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:42,905 INFO L93 Difference]: Finished difference Result 589 states and 1818 transitions. [2021-07-09 17:34:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:42,907 INFO L225 Difference]: With dead ends: 589 [2021-07-09 17:34:42,907 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:34:42,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:34:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 423. [2021-07-09 17:34:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.2464454976303316) internal successors, (1370), 422 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1370 transitions. [2021-07-09 17:34:42,912 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1370 transitions. Word has length 18 [2021-07-09 17:34:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:42,912 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1370 transitions. [2021-07-09 17:34:42,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1370 transitions. [2021-07-09 17:34:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:42,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:42,913 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:43,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6311 [2021-07-09 17:34:43,114 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -876759992, now seen corresponding path program 218 times [2021-07-09 17:34:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:43,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144549565] [2021-07-09 17:34:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:43,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144549565] [2021-07-09 17:34:43,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144549565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027459233] [2021-07-09 17:34:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:43,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:43,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:43,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:43,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:43,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:43,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:43,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,359 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-07-09 17:34:43,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:43,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-07-09 17:34:43,411 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1636, array_0], 1=[v_prenex_1637, array_4]} [2021-07-09 17:34:43,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:43,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:43,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,458 INFO L628 ElimStorePlain]: treesize reduction 78, result has 38.6 percent of original size [2021-07-09 17:34:43,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:43,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:43,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1637 vanished before elimination [2021-07-09 17:34:43,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:43,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:43,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:43,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:43,507 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-07-09 17:34:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027459233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:43,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:34:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811213792] [2021-07-09 17:34:43,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:34:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:34:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:34:43,564 INFO L87 Difference]: Start difference. First operand 423 states and 1370 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:43,853 INFO L93 Difference]: Finished difference Result 593 states and 1835 transitions. [2021-07-09 17:34:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:34:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:43,855 INFO L225 Difference]: With dead ends: 593 [2021-07-09 17:34:43,855 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:34:43,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:34:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:34:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 417. [2021-07-09 17:34:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.2403846153846154) internal successors, (1348), 416 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1348 transitions. [2021-07-09 17:34:43,861 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1348 transitions. Word has length 18 [2021-07-09 17:34:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:43,861 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1348 transitions. [2021-07-09 17:34:43,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1348 transitions. [2021-07-09 17:34:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:43,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:43,861 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:44,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6320,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,062 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1750500672, now seen corresponding path program 219 times [2021-07-09 17:34:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088992423] [2021-07-09 17:34:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:44,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088992423] [2021-07-09 17:34:44,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088992423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745622753] [2021-07-09 17:34:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:44,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:44,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:44,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:44,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:44,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:44,324 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-07-09 17:34:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:44,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:44,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,445 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:34:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:44,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:44,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:44,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:44,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:44,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:44,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:44,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:44,501 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1640 vanished before elimination [2021-07-09 17:34:44,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:44,502 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-07-09 17:34:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:44,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745622753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:44,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:44,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97344475] [2021-07-09 17:34:44,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:44,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:44,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:44,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:44,563 INFO L87 Difference]: Start difference. First operand 417 states and 1348 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:45,085 INFO L93 Difference]: Finished difference Result 604 states and 1871 transitions. [2021-07-09 17:34:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:45,087 INFO L225 Difference]: With dead ends: 604 [2021-07-09 17:34:45,087 INFO L226 Difference]: Without dead ends: 591 [2021-07-09 17:34:45,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:34:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-09 17:34:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 411. [2021-07-09 17:34:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.2439024390243905) internal successors, (1330), 410 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1330 transitions. [2021-07-09 17:34:45,093 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1330 transitions. Word has length 18 [2021-07-09 17:34:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:45,093 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1330 transitions. [2021-07-09 17:34:45,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1330 transitions. [2021-07-09 17:34:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:45,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:45,093 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:45,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6330 [2021-07-09 17:34:45,294 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1973011818, now seen corresponding path program 220 times [2021-07-09 17:34:45,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:45,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002325615] [2021-07-09 17:34:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:45,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002325615] [2021-07-09 17:34:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002325615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033631695] [2021-07-09 17:34:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:45,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:45,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:45,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:45,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:45,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:45,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:50 [2021-07-09 17:34:45,634 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:34:45,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:45,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:45,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:45,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:45,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:45,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:45,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:45,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,725 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-07-09 17:34:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:45,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:45,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:45,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:45,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:45,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:45,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:45,762 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-07-09 17:34:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:45,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033631695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:45,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534460168] [2021-07-09 17:34:45,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:45,820 INFO L87 Difference]: Start difference. First operand 411 states and 1330 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:46,374 INFO L93 Difference]: Finished difference Result 642 states and 1992 transitions. [2021-07-09 17:34:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:46,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:46,376 INFO L225 Difference]: With dead ends: 642 [2021-07-09 17:34:46,376 INFO L226 Difference]: Without dead ends: 634 [2021-07-09 17:34:46,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-07-09 17:34:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 402. [2021-07-09 17:34:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.2344139650872816) internal successors, (1297), 401 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1297 transitions. [2021-07-09 17:34:46,382 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1297 transitions. Word has length 18 [2021-07-09 17:34:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:46,382 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1297 transitions. [2021-07-09 17:34:46,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1297 transitions. [2021-07-09 17:34:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:46,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:46,383 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:46,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6343,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:46,583 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash -615142990, now seen corresponding path program 221 times [2021-07-09 17:34:46,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:46,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433903775] [2021-07-09 17:34:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:46,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433903775] [2021-07-09 17:34:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433903775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511781103] [2021-07-09 17:34:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:46,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:46,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:47,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:47,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:47,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:47,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:47,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:47,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:47,036 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,144 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:34:47,144 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:34:47,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:34:47,148 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:34:47,317 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1649, array_4], 1=[v_prenex_1648, array_0]} [2021-07-09 17:34:47,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:47,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:47,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,348 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-07-09 17:34:47,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:47,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:47,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,365 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1648 vanished before elimination [2021-07-09 17:34:47,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:47,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:47,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:47,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:47,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:47,395 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:34:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:47,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511781103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:47,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:47,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746966106] [2021-07-09 17:34:47,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:47,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:47,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:47,419 INFO L87 Difference]: Start difference. First operand 402 states and 1297 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,126 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-07-09 17:34:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:48,772 INFO L93 Difference]: Finished difference Result 581 states and 1782 transitions. [2021-07-09 17:34:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:48,773 INFO L225 Difference]: With dead ends: 581 [2021-07-09 17:34:48,773 INFO L226 Difference]: Without dead ends: 569 [2021-07-09 17:34:48,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1303.4ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-07-09 17:34:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 408. [2021-07-09 17:34:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.2235872235872236) internal successors, (1312), 407 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1312 transitions. [2021-07-09 17:34:48,779 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1312 transitions. Word has length 18 [2021-07-09 17:34:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:48,779 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1312 transitions. [2021-07-09 17:34:48,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1312 transitions. [2021-07-09 17:34:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:48,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:48,779 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:48,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-07-09 17:34:48,981 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash 866094880, now seen corresponding path program 222 times [2021-07-09 17:34:48,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:48,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083995121] [2021-07-09 17:34:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:49,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:49,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083995121] [2021-07-09 17:34:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083995121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:49,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049397962] [2021-07-09 17:34:49,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:49,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:34:49,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:49,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:49,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:49,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:49,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:49,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:49,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:49,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,663 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:34:49,663 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:34:49,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:34:49,668 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-07-09 17:34:49,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:49,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:34:49,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,855 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-07-09 17:34:49,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1658 vanished before elimination [2021-07-09 17:34:49,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:49,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:49,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:49,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:49,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:49,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:49,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:49,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,946 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1656 vanished before elimination [2021-07-09 17:34:49,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:49,947 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-07-09 17:34:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049397962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:50,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:50,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087455546] [2021-07-09 17:34:50,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:50,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:50,009 INFO L87 Difference]: Start difference. First operand 408 states and 1312 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:50,714 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2021-07-09 17:34:50,980 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-09 17:34:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:51,351 INFO L93 Difference]: Finished difference Result 592 states and 1804 transitions. [2021-07-09 17:34:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:51,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:51,352 INFO L225 Difference]: With dead ends: 592 [2021-07-09 17:34:51,352 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:34:51,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1441.2ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:34:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 409. [2021-07-09 17:34:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.2401960784313726) internal successors, (1322), 408 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1322 transitions. [2021-07-09 17:34:51,358 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1322 transitions. Word has length 18 [2021-07-09 17:34:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:51,358 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1322 transitions. [2021-07-09 17:34:51,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1322 transitions. [2021-07-09 17:34:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:51,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:51,359 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:51,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6376 [2021-07-09 17:34:51,559 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash -450062424, now seen corresponding path program 223 times [2021-07-09 17:34:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:51,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599497183] [2021-07-09 17:34:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:51,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:51,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599497183] [2021-07-09 17:34:51,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599497183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779175796] [2021-07-09 17:34:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:52,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:52,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:52,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:52,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:52,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:52,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:52,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:34:52,198 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-07-09 17:34:52,363 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:34:52,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:34:52,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:52,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:34:52,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:52,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:52,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:52,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:52,400 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:52,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:34:52,409 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:52,414 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:34:52,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:52,423 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,560 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-07-09 17:34:52,560 INFO L628 ElimStorePlain]: treesize reduction 109, result has 57.1 percent of original size [2021-07-09 17:34:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:52,565 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:52,569 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:34:52,573 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:52,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:52,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:34:52,630 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-07-09 17:34:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:52,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779175796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:52,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:52,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448199014] [2021-07-09 17:34:52,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:52,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:52,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:52,712 INFO L87 Difference]: Start difference. First operand 409 states and 1322 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:53,419 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2021-07-09 17:34:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:53,671 INFO L93 Difference]: Finished difference Result 577 states and 1789 transitions. [2021-07-09 17:34:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:53,673 INFO L225 Difference]: With dead ends: 577 [2021-07-09 17:34:53,673 INFO L226 Difference]: Without dead ends: 567 [2021-07-09 17:34:53,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1096.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-09 17:34:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 407. [2021-07-09 17:34:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2438423645320196) internal successors, (1317), 406 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1317 transitions. [2021-07-09 17:34:53,682 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1317 transitions. Word has length 18 [2021-07-09 17:34:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:53,682 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1317 transitions. [2021-07-09 17:34:53,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1317 transitions. [2021-07-09 17:34:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:53,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:53,682 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:53,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6398 [2021-07-09 17:34:53,897 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1931932108, now seen corresponding path program 224 times [2021-07-09 17:34:53,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:53,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65920923] [2021-07-09 17:34:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:54,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:54,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65920923] [2021-07-09 17:34:54,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65920923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810818155] [2021-07-09 17:34:54,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:54,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:54,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:54,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:54,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:54,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:54,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,237 INFO L628 ElimStorePlain]: treesize reduction 39, result has 64.2 percent of original size [2021-07-09 17:34:54,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:54,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:130, output treesize:70 [2021-07-09 17:34:54,351 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1671, array_4], 1=[array_0, v_prenex_1670]} [2021-07-09 17:34:54,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:54,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:54,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:54,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,397 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:34:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:34:54,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,415 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:34:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:54,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:54,421 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:54,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:54,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:34:54,443 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:34:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810818155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:54,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:54,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489735845] [2021-07-09 17:34:54,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:54,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:54,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:54,466 INFO L87 Difference]: Start difference. First operand 407 states and 1317 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:54,955 INFO L93 Difference]: Finished difference Result 575 states and 1776 transitions. [2021-07-09 17:34:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:54,956 INFO L225 Difference]: With dead ends: 575 [2021-07-09 17:34:54,956 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:34:54,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:34:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:34:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 403. [2021-07-09 17:34:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.2487562189054726) internal successors, (1306), 402 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1306 transitions. [2021-07-09 17:34:54,961 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1306 transitions. Word has length 18 [2021-07-09 17:34:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:54,961 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1306 transitions. [2021-07-09 17:34:54,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1306 transitions. [2021-07-09 17:34:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:54,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:54,962 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:55,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6427,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,169 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -881797318, now seen corresponding path program 225 times [2021-07-09 17:34:55,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:55,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035337249] [2021-07-09 17:34:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:55,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035337249] [2021-07-09 17:34:55,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035337249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089507725] [2021-07-09 17:34:55,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:55,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:55,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:55,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:55,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:55,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:55,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:34:55,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-07-09 17:34:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:34:55,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:55,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,562 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-07-09 17:34:55,562 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:34:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:55,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:55,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:55,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:55,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:34:55,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:34:55,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:55,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:55,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:55,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:55,621 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-07-09 17:34:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:55,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089507725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:55,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:34:55,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253087478] [2021-07-09 17:34:55,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:34:55,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:34:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:34:55,679 INFO L87 Difference]: Start difference. First operand 403 states and 1306 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:56,206 INFO L93 Difference]: Finished difference Result 555 states and 1722 transitions. [2021-07-09 17:34:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:34:56,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:56,207 INFO L225 Difference]: With dead ends: 555 [2021-07-09 17:34:56,207 INFO L226 Difference]: Without dead ends: 542 [2021-07-09 17:34:56,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:34:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-09 17:34:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 387. [2021-07-09 17:34:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.243523316062176) internal successors, (1252), 386 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1252 transitions. [2021-07-09 17:34:56,212 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1252 transitions. Word has length 18 [2021-07-09 17:34:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:56,212 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1252 transitions. [2021-07-09 17:34:56,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1252 transitions. [2021-07-09 17:34:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:56,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:56,213 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:56,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-07-09 17:34:56,414 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1014303434, now seen corresponding path program 226 times [2021-07-09 17:34:56,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:56,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697610223] [2021-07-09 17:34:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:56,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:56,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697610223] [2021-07-09 17:34:56,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697610223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:56,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914794621] [2021-07-09 17:34:56,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:56,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:56,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:34:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:56,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:34:56,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:34:56,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:34:56,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:34:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:56,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:56,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:56,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:56,825 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 17:34:56,825 INFO L628 ElimStorePlain]: treesize reduction 59, result has 78.0 percent of original size [2021-07-09 17:34:56,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:56,827 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-07-09 17:34:57,144 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-07-09 17:34:57,280 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-07-09 17:34:57,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:57,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:57,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:57,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:57,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:57,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:57,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:57,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:57,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:57,328 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:34:57,334 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:57,340 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:57,345 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:34:57,351 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:57,356 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,513 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 17:34:57,514 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:34:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:34:57,518 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:57,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:34:57,522 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:57,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:34:57,579 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:34:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:57,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914794621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:34:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712993158] [2021-07-09 17:34:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:34:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:34:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:34:57,662 INFO L87 Difference]: Start difference. First operand 387 states and 1252 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,191 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:34:58,597 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2021-07-09 17:34:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:59,247 INFO L93 Difference]: Finished difference Result 571 states and 1741 transitions. [2021-07-09 17:34:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:34:59,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:59,248 INFO L225 Difference]: With dead ends: 571 [2021-07-09 17:34:59,248 INFO L226 Difference]: Without dead ends: 551 [2021-07-09 17:34:59,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1682.8ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:34:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-09 17:34:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 386. [2021-07-09 17:34:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.2311688311688314) internal successors, (1244), 385 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1244 transitions. [2021-07-09 17:34:59,254 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1244 transitions. Word has length 18 [2021-07-09 17:34:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:59,254 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1244 transitions. [2021-07-09 17:34:59,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1244 transitions. [2021-07-09 17:34:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:34:59,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:59,255 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:59,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6456,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:59,468 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:59,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1851708756, now seen corresponding path program 227 times [2021-07-09 17:34:59,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:59,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083536713] [2021-07-09 17:34:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:59,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:59,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083536713] [2021-07-09 17:34:59,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083536713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807005355] [2021-07-09 17:34:59,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:59,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:59,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:34:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:34:59,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:34:59,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:34:59,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:34:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:34:59,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:59,909 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-07-09 17:34:59,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:34:59,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-07-09 17:35:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:00,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:00,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,196 INFO L628 ElimStorePlain]: treesize reduction 104, result has 43.5 percent of original size [2021-07-09 17:35:00,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:00,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:00,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:00,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:00,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:00,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,264 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:35:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:00,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:00,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:00,290 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1687 vanished before elimination [2021-07-09 17:35:00,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:00,292 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:198, output treesize:46 [2021-07-09 17:35:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:00,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807005355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:00,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:00,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:00,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6403092] [2021-07-09 17:35:00,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:00,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:00,387 INFO L87 Difference]: Start difference. First operand 386 states and 1244 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:00,849 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 17:35:01,042 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 17:35:01,291 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-09 17:35:01,674 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-07-09 17:35:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:01,849 INFO L93 Difference]: Finished difference Result 542 states and 1658 transitions. [2021-07-09 17:35:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:01,851 INFO L225 Difference]: With dead ends: 542 [2021-07-09 17:35:01,851 INFO L226 Difference]: Without dead ends: 526 [2021-07-09 17:35:01,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1552.4ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-09 17:35:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 385. [2021-07-09 17:35:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2369791666666665) internal successors, (1243), 384 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1243 transitions. [2021-07-09 17:35:01,856 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1243 transitions. Word has length 18 [2021-07-09 17:35:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:01,856 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1243 transitions. [2021-07-09 17:35:01,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1243 transitions. [2021-07-09 17:35:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:01,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:01,857 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:02,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6489,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:02,058 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash -332880908, now seen corresponding path program 228 times [2021-07-09 17:35:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:02,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489444999] [2021-07-09 17:35:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:02,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489444999] [2021-07-09 17:35:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489444999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954407331] [2021-07-09 17:35:02,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:02,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:35:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:02,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:02,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:02,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:02,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:02,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:02,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:02,363 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,450 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:35:02,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:02,451 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:35:02,697 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1696], 1=[array_0, v_prenex_1695]} [2021-07-09 17:35:02,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:02,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:02,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,736 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:35:02,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:02,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:02,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:02,754 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:35:02,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:02,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:02,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:02,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:02,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:02,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:02,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:02,786 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:35:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954407331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:02,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:02,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800622979] [2021-07-09 17:35:02,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:02,809 INFO L87 Difference]: Start difference. First operand 385 states and 1243 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:03,411 INFO L93 Difference]: Finished difference Result 530 states and 1636 transitions. [2021-07-09 17:35:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:03,413 INFO L225 Difference]: With dead ends: 530 [2021-07-09 17:35:03,413 INFO L226 Difference]: Without dead ends: 525 [2021-07-09 17:35:03,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 703.4ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-09 17:35:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 388. [2021-07-09 17:35:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.242894056847545) internal successors, (1255), 387 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1255 transitions. [2021-07-09 17:35:03,419 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1255 transitions. Word has length 18 [2021-07-09 17:35:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:03,419 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1255 transitions. [2021-07-09 17:35:03,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1255 transitions. [2021-07-09 17:35:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:03,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:03,420 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:03,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6506 [2021-07-09 17:35:03,637 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:03,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2022097642, now seen corresponding path program 229 times [2021-07-09 17:35:03,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:03,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627826522] [2021-07-09 17:35:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:03,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627826522] [2021-07-09 17:35:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627826522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035621063] [2021-07-09 17:35:03,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:03,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:03,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:03,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:03,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:03,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:03,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:03,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:03,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:03,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,037 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:35:04,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:04,043 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:35:04,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:04,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:04,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:04,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,312 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-07-09 17:35:04,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:04,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:04,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:04,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:04,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:04,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:04,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:04,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:04,376 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1700 vanished before elimination [2021-07-09 17:35:04,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:04,378 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-07-09 17:35:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:04,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035621063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:04,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:04,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672378712] [2021-07-09 17:35:04,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:04,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:04,437 INFO L87 Difference]: Start difference. First operand 388 states and 1255 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:04,883 INFO L93 Difference]: Finished difference Result 551 states and 1687 transitions. [2021-07-09 17:35:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:04,885 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:35:04,885 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:35:04,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:35:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:35:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 385. [2021-07-09 17:35:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2369791666666665) internal successors, (1243), 384 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1243 transitions. [2021-07-09 17:35:04,891 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1243 transitions. Word has length 18 [2021-07-09 17:35:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:04,892 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1243 transitions. [2021-07-09 17:35:04,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1243 transitions. [2021-07-09 17:35:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:04,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:04,892 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:05,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6524,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:05,093 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1074314582, now seen corresponding path program 230 times [2021-07-09 17:35:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823862716] [2021-07-09 17:35:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:05,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823862716] [2021-07-09 17:35:05,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823862716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285983210] [2021-07-09 17:35:05,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:05,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:05,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:05,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:05,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:05,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,454 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-07-09 17:35:05,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:05,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-07-09 17:35:05,649 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:35:05,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:05,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:05,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:05,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:05,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:05,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,735 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:35:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:35:05,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:05,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:05,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:05,753 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:05,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:05,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:05,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:05,791 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-07-09 17:35:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285983210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:05,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:05,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401647604] [2021-07-09 17:35:05,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:05,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:05,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:05,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:05,869 INFO L87 Difference]: Start difference. First operand 385 states and 1243 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:06,637 INFO L93 Difference]: Finished difference Result 540 states and 1665 transitions. [2021-07-09 17:35:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:06,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:06,638 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:35:06,638 INFO L226 Difference]: Without dead ends: 535 [2021-07-09 17:35:06,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-09 17:35:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 386. [2021-07-09 17:35:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.2337662337662336) internal successors, (1245), 385 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1245 transitions. [2021-07-09 17:35:06,645 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1245 transitions. Word has length 18 [2021-07-09 17:35:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:06,645 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1245 transitions. [2021-07-09 17:35:06,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1245 transitions. [2021-07-09 17:35:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:06,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:06,646 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:06,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6542 [2021-07-09 17:35:06,846 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:06,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1147687062, now seen corresponding path program 231 times [2021-07-09 17:35:06,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:06,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565132099] [2021-07-09 17:35:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:07,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565132099] [2021-07-09 17:35:07,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565132099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338798568] [2021-07-09 17:35:07,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:07,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:07,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:07,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:07,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:07,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,213 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-07-09 17:35:07,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:07,214 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-07-09 17:35:07,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:07,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:07,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:07,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:07,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:07,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:07,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:07,350 INFO L628 ElimStorePlain]: treesize reduction 79, result has 49.7 percent of original size [2021-07-09 17:35:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:07,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:07,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:07,356 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:07,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:07,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:07,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:07,389 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-07-09 17:35:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338798568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:07,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:07,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045889951] [2021-07-09 17:35:07,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:07,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:07,498 INFO L87 Difference]: Start difference. First operand 386 states and 1245 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,939 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-07-09 17:35:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:08,349 INFO L93 Difference]: Finished difference Result 551 states and 1681 transitions. [2021-07-09 17:35:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:08,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:08,350 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:35:08,350 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:35:08,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:35:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 386. [2021-07-09 17:35:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.2363636363636363) internal successors, (1246), 385 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1246 transitions. [2021-07-09 17:35:08,355 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1246 transitions. Word has length 18 [2021-07-09 17:35:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:08,355 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1246 transitions. [2021-07-09 17:35:08,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1246 transitions. [2021-07-09 17:35:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:08,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:08,356 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:08,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6555,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:08,572 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash 843016612, now seen corresponding path program 232 times [2021-07-09 17:35:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20969099] [2021-07-09 17:35:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:08,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:08,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20969099] [2021-07-09 17:35:08,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20969099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:08,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108036328] [2021-07-09 17:35:08,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:08,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:08,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:08,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:08,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:08,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:08,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:08,896 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:08,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:08,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,011 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 17:35:09,011 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.3 percent of original size [2021-07-09 17:35:09,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:09,013 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-07-09 17:35:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:35:09,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:09,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-07-09 17:35:09,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:09,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:09,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:09,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:09,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:09,169 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:09,173 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:09,176 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:09,181 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:09,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:09,190 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:09,194 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,277 INFO L628 ElimStorePlain]: treesize reduction 213, result has 29.5 percent of original size [2021-07-09 17:35:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:09,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:09,280 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:09,283 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:09,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:09,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:09,312 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:599, output treesize:67 [2021-07-09 17:35:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:09,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108036328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:09,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:09,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873223492] [2021-07-09 17:35:09,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:09,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:09,456 INFO L87 Difference]: Start difference. First operand 386 states and 1246 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,012 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:35:10,138 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 17:35:10,647 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-09 17:35:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:10,933 INFO L93 Difference]: Finished difference Result 580 states and 1777 transitions. [2021-07-09 17:35:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:10,935 INFO L225 Difference]: With dead ends: 580 [2021-07-09 17:35:10,935 INFO L226 Difference]: Without dead ends: 566 [2021-07-09 17:35:10,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1434.9ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-09 17:35:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 384. [2021-07-09 17:35:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.240208877284595) internal successors, (1241), 383 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1241 transitions. [2021-07-09 17:35:10,941 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1241 transitions. Word has length 18 [2021-07-09 17:35:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:10,941 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1241 transitions. [2021-07-09 17:35:10,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1241 transitions. [2021-07-09 17:35:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:10,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:10,942 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6568,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,142 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 325764, now seen corresponding path program 233 times [2021-07-09 17:35:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145863609] [2021-07-09 17:35:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:11,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145863609] [2021-07-09 17:35:11,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145863609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094557463] [2021-07-09 17:35:11,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:11,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:11,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:11,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:11,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:11,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:11,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:11,542 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,641 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:35:11,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:11,642 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:35:11,729 INFO L446 ElimStorePlain]: Different costs {0=[array_0, array_4], 1=[v_prenex_1713, v_prenex_1709, v_prenex_1708, v_prenex_1710, v_prenex_1712, v_prenex_1711]} [2021-07-09 17:35:11,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:11,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,828 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-07-09 17:35:11,829 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:35:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:11,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:11,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:11,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:11,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:11,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:11,924 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:11,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:11,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:11,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,026 INFO L628 ElimStorePlain]: treesize reduction 14, result has 79.7 percent of original size [2021-07-09 17:35:12,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1712 vanished before elimination [2021-07-09 17:35:12,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1711 vanished before elimination [2021-07-09 17:35:12,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:12,028 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-07-09 17:35:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:12,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094557463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:12,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:12,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:12,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797733598] [2021-07-09 17:35:12,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:12,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:12,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:12,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:12,154 INFO L87 Difference]: Start difference. First operand 384 states and 1241 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,560 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-07-09 17:35:12,872 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-07-09 17:35:13,004 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-07-09 17:35:13,196 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-09 17:35:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:13,298 INFO L93 Difference]: Finished difference Result 557 states and 1706 transitions. [2021-07-09 17:35:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:13,300 INFO L225 Difference]: With dead ends: 557 [2021-07-09 17:35:13,300 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:35:13,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:35:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 381. [2021-07-09 17:35:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 3.2289473684210526) internal successors, (1227), 380 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1227 transitions. [2021-07-09 17:35:13,305 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1227 transitions. Word has length 18 [2021-07-09 17:35:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:13,305 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1227 transitions. [2021-07-09 17:35:13,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1227 transitions. [2021-07-09 17:35:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:13,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:13,306 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:13,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6589,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,506 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:13,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1454877628, now seen corresponding path program 234 times [2021-07-09 17:35:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:13,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604648527] [2021-07-09 17:35:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:13,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604648527] [2021-07-09 17:35:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604648527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041023039] [2021-07-09 17:35:13,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:35:13,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:13,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:13,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:13,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:13,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:13,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:13,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:13,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:13,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:13,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-07-09 17:35:14,139 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2021-07-09 17:35:14,244 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-07-09 17:35:14,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:14,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:14,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:14,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:14,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:14,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:14,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:14,280 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:14,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:14,289 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:14,294 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:14,299 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:14,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,458 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 17:35:14,458 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.3 percent of original size [2021-07-09 17:35:14,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:14,463 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:14,468 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:14,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:35:14,472 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:14,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:14,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:35:14,537 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:405, output treesize:77 [2021-07-09 17:35:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:14,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041023039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:14,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:14,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:14,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944082559] [2021-07-09 17:35:14,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:14,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:14,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:14,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:14,647 INFO L87 Difference]: Start difference. First operand 381 states and 1227 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,163 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:35:15,397 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2021-07-09 17:35:15,640 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-09 17:35:16,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:16,075 INFO L93 Difference]: Finished difference Result 560 states and 1699 transitions. [2021-07-09 17:35:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:16,076 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:35:16,076 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:35:16,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1491.1ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:35:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 385. [2021-07-09 17:35:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2109375) internal successors, (1233), 384 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1233 transitions. [2021-07-09 17:35:16,081 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1233 transitions. Word has length 18 [2021-07-09 17:35:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:16,081 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1233 transitions. [2021-07-09 17:35:16,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1233 transitions. [2021-07-09 17:35:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:16,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:16,082 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:16,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6606,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:16,283 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2095137096, now seen corresponding path program 235 times [2021-07-09 17:35:16,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:16,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469506084] [2021-07-09 17:35:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:16,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469506084] [2021-07-09 17:35:16,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469506084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562147801] [2021-07-09 17:35:16,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:16,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:16,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:16,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:16,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:16,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:16,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:16,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:16,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:16,737 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-07-09 17:35:16,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:16,739 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:35:16,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:17,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:17,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,060 INFO L628 ElimStorePlain]: treesize reduction 82, result has 48.4 percent of original size [2021-07-09 17:35:17,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:17,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,086 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1728 vanished before elimination [2021-07-09 17:35:17,086 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:35:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:17,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:17,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:17,119 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:35:17,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:17,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:17,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:17,152 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:35:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:17,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562147801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:17,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:17,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:17,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587422323] [2021-07-09 17:35:17,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:17,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:17,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:17,215 INFO L87 Difference]: Start difference. First operand 385 states and 1233 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:17,745 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-09 17:35:18,089 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-07-09 17:35:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:18,641 INFO L93 Difference]: Finished difference Result 602 states and 1813 transitions. [2021-07-09 17:35:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:18,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:18,643 INFO L225 Difference]: With dead ends: 602 [2021-07-09 17:35:18,643 INFO L226 Difference]: Without dead ends: 581 [2021-07-09 17:35:18,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1531.0ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-07-09 17:35:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 390. [2021-07-09 17:35:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.2467866323907457) internal successors, (1263), 389 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1263 transitions. [2021-07-09 17:35:18,648 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1263 transitions. Word has length 18 [2021-07-09 17:35:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:18,648 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1263 transitions. [2021-07-09 17:35:18,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1263 transitions. [2021-07-09 17:35:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:18,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:18,649 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:18,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6624,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:18,849 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash -125787926, now seen corresponding path program 236 times [2021-07-09 17:35:18,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:18,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219525953] [2021-07-09 17:35:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:18,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:18,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219525953] [2021-07-09 17:35:18,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219525953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119142600] [2021-07-09 17:35:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:19,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:19,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:19,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:19,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:19,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:19,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:19,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:19,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,152 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-07-09 17:35:19,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:19,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-07-09 17:35:19,306 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:35:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:19,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:19,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:19,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:19,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:19,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:19,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:19,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,402 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-07-09 17:35:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:19,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:19,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:19,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:19,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:19,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:19,436 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-07-09 17:35:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119142600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:19,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:19,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671443700] [2021-07-09 17:35:19,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:19,495 INFO L87 Difference]: Start difference. First operand 390 states and 1263 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:20,418 INFO L93 Difference]: Finished difference Result 635 states and 1947 transitions. [2021-07-09 17:35:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:35:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:20,420 INFO L225 Difference]: With dead ends: 635 [2021-07-09 17:35:20,420 INFO L226 Difference]: Without dead ends: 630 [2021-07-09 17:35:20,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-07-09 17:35:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 384. [2021-07-09 17:35:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.227154046997389) internal successors, (1236), 383 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1236 transitions. [2021-07-09 17:35:20,426 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1236 transitions. Word has length 18 [2021-07-09 17:35:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:20,426 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1236 transitions. [2021-07-09 17:35:20,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1236 transitions. [2021-07-09 17:35:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:20,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:20,427 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:20,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6647,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:20,627 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176344, now seen corresponding path program 237 times [2021-07-09 17:35:20,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:20,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83893215] [2021-07-09 17:35:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:20,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:20,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83893215] [2021-07-09 17:35:20,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83893215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:20,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420575911] [2021-07-09 17:35:20,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:20,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:20,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:20,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:20,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:20,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:20,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:20,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:20,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:20,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:20,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:21,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:21,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-07-09 17:35:21,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:21,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:21,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:21,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:21,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:21,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:21,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:21,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:21,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:21,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:21,134 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,201 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-07-09 17:35:21,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:21,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:21,204 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:21,207 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:21,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:21,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:21,234 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-07-09 17:35:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:21,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420575911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:21,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:21,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998841263] [2021-07-09 17:35:21,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:21,389 INFO L87 Difference]: Start difference. First operand 384 states and 1236 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:21,850 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:35:22,172 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-09 17:35:22,321 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-09 17:35:22,580 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-07-09 17:35:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:22,740 INFO L93 Difference]: Finished difference Result 534 states and 1626 transitions. [2021-07-09 17:35:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:22,741 INFO L225 Difference]: With dead ends: 534 [2021-07-09 17:35:22,741 INFO L226 Difference]: Without dead ends: 518 [2021-07-09 17:35:22,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1401.5ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-09 17:35:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 383. [2021-07-09 17:35:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.225130890052356) internal successors, (1232), 382 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1232 transitions. [2021-07-09 17:35:22,746 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1232 transitions. Word has length 18 [2021-07-09 17:35:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:22,746 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1232 transitions. [2021-07-09 17:35:22,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1232 transitions. [2021-07-09 17:35:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:22,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:22,747 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:22,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6660 [2021-07-09 17:35:22,947 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 216795586, now seen corresponding path program 238 times [2021-07-09 17:35:22,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:22,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121970517] [2021-07-09 17:35:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:23,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121970517] [2021-07-09 17:35:23,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121970517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408492807] [2021-07-09 17:35:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:23,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:23,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:23,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:23,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:23,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:23,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,283 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-07-09 17:35:23,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:23,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-07-09 17:35:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:23,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:23,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:23,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:23,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:23,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:23,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:23,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:23,363 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:23,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:23,366 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,434 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-07-09 17:35:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:23,437 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:23,440 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:23,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:23,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:23,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:23,470 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-07-09 17:35:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:23,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408492807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:23,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841213397] [2021-07-09 17:35:23,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:23,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:23,573 INFO L87 Difference]: Start difference. First operand 383 states and 1232 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:24,032 INFO L93 Difference]: Finished difference Result 534 states and 1636 transitions. [2021-07-09 17:35:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:24,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:24,034 INFO L225 Difference]: With dead ends: 534 [2021-07-09 17:35:24,034 INFO L226 Difference]: Without dead ends: 529 [2021-07-09 17:35:24,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-09 17:35:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-07-09 17:35:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.224543080939948) internal successors, (1235), 383 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1235 transitions. [2021-07-09 17:35:24,039 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1235 transitions. Word has length 18 [2021-07-09 17:35:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:24,039 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1235 transitions. [2021-07-09 17:35:24,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1235 transitions. [2021-07-09 17:35:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:24,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:24,040 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:24,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6674 [2021-07-09 17:35:24,240 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:24,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1578351692, now seen corresponding path program 239 times [2021-07-09 17:35:24,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:24,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447732706] [2021-07-09 17:35:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:24,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:24,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447732706] [2021-07-09 17:35:24,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447732706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:24,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551843370] [2021-07-09 17:35:24,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:24,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:24,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:24,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:24,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:24,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:24,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,634 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.3 percent of original size [2021-07-09 17:35:24,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:24,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:103 [2021-07-09 17:35:24,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:24,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:24,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,787 INFO L628 ElimStorePlain]: treesize reduction 103, result has 46.6 percent of original size [2021-07-09 17:35:24,787 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1735 vanished before elimination [2021-07-09 17:35:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:24,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:24,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:24,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:24,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:24,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:24,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:24,924 INFO L628 ElimStorePlain]: treesize reduction 16, result has 77.8 percent of original size [2021-07-09 17:35:24,924 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:35:24,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:24,925 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:217, output treesize:56 [2021-07-09 17:35:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:25,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551843370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:25,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:25,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795464717] [2021-07-09 17:35:25,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:25,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:25,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:25,031 INFO L87 Difference]: Start difference. First operand 384 states and 1235 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,375 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-07-09 17:35:25,652 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-07-09 17:35:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:25,844 INFO L93 Difference]: Finished difference Result 535 states and 1633 transitions. [2021-07-09 17:35:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:25,845 INFO L225 Difference]: With dead ends: 535 [2021-07-09 17:35:25,845 INFO L226 Difference]: Without dead ends: 524 [2021-07-09 17:35:25,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 846.2ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:35:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-07-09 17:35:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 382. [2021-07-09 17:35:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.215223097112861) internal successors, (1225), 381 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1225 transitions. [2021-07-09 17:35:25,850 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1225 transitions. Word has length 18 [2021-07-09 17:35:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:25,850 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1225 transitions. [2021-07-09 17:35:25,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1225 transitions. [2021-07-09 17:35:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:25,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:25,851 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:26,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6687,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:26,052 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1977028402, now seen corresponding path program 240 times [2021-07-09 17:35:26,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:26,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492813911] [2021-07-09 17:35:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492813911] [2021-07-09 17:35:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492813911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377009410] [2021-07-09 17:35:26,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:26,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:26,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:26,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:26,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:26,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:26,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:26,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:26,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-07-09 17:35:26,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:26,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:26,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:26,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:26,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:26,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:26,521 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:26,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:26,528 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:26,532 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:26,535 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,611 INFO L628 ElimStorePlain]: treesize reduction 108, result has 50.2 percent of original size [2021-07-09 17:35:26,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:26,614 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:26,617 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:26,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:26,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:26,651 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:421, output treesize:87 [2021-07-09 17:35:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377009410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:26,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:26,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116060592] [2021-07-09 17:35:26,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:26,773 INFO L87 Difference]: Start difference. First operand 382 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,418 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-09 17:35:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:27,799 INFO L93 Difference]: Finished difference Result 583 states and 1787 transitions. [2021-07-09 17:35:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:27,800 INFO L225 Difference]: With dead ends: 583 [2021-07-09 17:35:27,800 INFO L226 Difference]: Without dead ends: 577 [2021-07-09 17:35:27,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-09 17:35:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 378. [2021-07-09 17:35:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.2148541114058355) internal successors, (1212), 377 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1212 transitions. [2021-07-09 17:35:27,806 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1212 transitions. Word has length 18 [2021-07-09 17:35:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:27,806 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1212 transitions. [2021-07-09 17:35:27,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1212 transitions. [2021-07-09 17:35:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:27,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:27,806 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:28,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6700 [2021-07-09 17:35:28,007 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1028287122, now seen corresponding path program 241 times [2021-07-09 17:35:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:28,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639025172] [2021-07-09 17:35:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:28,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639025172] [2021-07-09 17:35:28,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639025172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546394689] [2021-07-09 17:35:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:28,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:28,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:28,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:28,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:28,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:28,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:28,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-07-09 17:35:28,706 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-07-09 17:35:28,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:28,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:28,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:28,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:28,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:28,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:28,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:28,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:28,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:28,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:28,755 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:28,759 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:28,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,911 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-09 17:35:28,912 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-07-09 17:35:28,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:28,917 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:35:28,921 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:28,925 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:28,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:28,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:35:28,989 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:399, output treesize:72 [2021-07-09 17:35:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546394689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:29,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:29,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:29,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246618145] [2021-07-09 17:35:29,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:29,084 INFO L87 Difference]: Start difference. First operand 378 states and 1212 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,704 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2021-07-09 17:35:30,014 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 107 [2021-07-09 17:35:30,352 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 104 [2021-07-09 17:35:30,615 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2021-07-09 17:35:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:30,684 INFO L93 Difference]: Finished difference Result 583 states and 1754 transitions. [2021-07-09 17:35:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:30,685 INFO L225 Difference]: With dead ends: 583 [2021-07-09 17:35:30,685 INFO L226 Difference]: Without dead ends: 571 [2021-07-09 17:35:30,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1774.9ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-09 17:35:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 383. [2021-07-09 17:35:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.1989528795811517) internal successors, (1222), 382 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1222 transitions. [2021-07-09 17:35:30,690 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1222 transitions. Word has length 18 [2021-07-09 17:35:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:30,691 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1222 transitions. [2021-07-09 17:35:30,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1222 transitions. [2021-07-09 17:35:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:30,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:30,691 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:30,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6715,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:30,892 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -102263678, now seen corresponding path program 242 times [2021-07-09 17:35:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:30,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405053661] [2021-07-09 17:35:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:31,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:31,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405053661] [2021-07-09 17:35:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405053661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201464663] [2021-07-09 17:35:31,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:31,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:31,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:31,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:31,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:31,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:31,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:31,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:31,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:31,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,225 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:35:31,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:31,226 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:35:31,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:31,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:31,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,579 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-07-09 17:35:31,579 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:35:31,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:31,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:31,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:31,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:31,633 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1751 vanished before elimination [2021-07-09 17:35:31,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:31,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:35:31,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:31,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:31,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:31,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:31,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:31,670 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:35:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:31,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201464663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:31,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:31,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745066585] [2021-07-09 17:35:31,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:31,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:31,731 INFO L87 Difference]: Start difference. First operand 383 states and 1222 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,151 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-07-09 17:35:32,393 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-07-09 17:35:32,587 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-07-09 17:35:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:32,711 INFO L93 Difference]: Finished difference Result 577 states and 1743 transitions. [2021-07-09 17:35:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:32,713 INFO L225 Difference]: With dead ends: 577 [2021-07-09 17:35:32,713 INFO L226 Difference]: Without dead ends: 570 [2021-07-09 17:35:32,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1086.1ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-09 17:35:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 377. [2021-07-09 17:35:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.2101063829787235) internal successors, (1207), 376 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1207 transitions. [2021-07-09 17:35:32,718 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1207 transitions. Word has length 18 [2021-07-09 17:35:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:32,718 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1207 transitions. [2021-07-09 17:35:32,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1207 transitions. [2021-07-09 17:35:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:32,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:32,719 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:32,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6733 [2021-07-09 17:35:32,919 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:32,919 INFO L82 PathProgramCache]: Analyzing trace with hash -360500806, now seen corresponding path program 243 times [2021-07-09 17:35:32,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:32,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747583942] [2021-07-09 17:35:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:33,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747583942] [2021-07-09 17:35:33,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747583942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88593874] [2021-07-09 17:35:33,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:33,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:33,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:33,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:33,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:33,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:33,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:33,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,191 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-07-09 17:35:33,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:33,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-07-09 17:35:33,359 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:35:33,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:33,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:33,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:33,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:33,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:33,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:33,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:33,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,462 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-07-09 17:35:33,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:33,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:33,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:33,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:33,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:33,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:33,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:33,501 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-07-09 17:35:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:33,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88593874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:33,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:33,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:33,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932442516] [2021-07-09 17:35:33,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:33,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:33,562 INFO L87 Difference]: Start difference. First operand 377 states and 1207 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:34,138 INFO L93 Difference]: Finished difference Result 593 states and 1811 transitions. [2021-07-09 17:35:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:34,139 INFO L225 Difference]: With dead ends: 593 [2021-07-09 17:35:34,139 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:35:34,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 550.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:35:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 377. [2021-07-09 17:35:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.2101063829787235) internal successors, (1207), 376 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1207 transitions. [2021-07-09 17:35:34,145 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1207 transitions. Word has length 18 [2021-07-09 17:35:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:34,145 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1207 transitions. [2021-07-09 17:35:34,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1207 transitions. [2021-07-09 17:35:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:34,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:34,145 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:34,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6758,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,346 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2085617846, now seen corresponding path program 244 times [2021-07-09 17:35:34,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:34,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257899596] [2021-07-09 17:35:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:34,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:34,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257899596] [2021-07-09 17:35:34,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257899596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:34,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055177254] [2021-07-09 17:35:34,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:34,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:34,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:34,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:34,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:34,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:34,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:34,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:34,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:34,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:34,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-07-09 17:35:35,070 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-07-09 17:35:35,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:35,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:35,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:35,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:35:35,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:35,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:35,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:35,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:35,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:35,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:35,121 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:35,126 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:35,130 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,279 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-09 17:35:35,279 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-07-09 17:35:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:35:35,284 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:35,289 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:35,293 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:35,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:35,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:35:35,356 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:399, output treesize:72 [2021-07-09 17:35:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055177254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:35,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:35,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408209275] [2021-07-09 17:35:35,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:35,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:35,452 INFO L87 Difference]: Start difference. First operand 377 states and 1207 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:36,080 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-07-09 17:35:36,451 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 95 [2021-07-09 17:35:36,689 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-07-09 17:35:36,864 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-09 17:35:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:36,928 INFO L93 Difference]: Finished difference Result 576 states and 1752 transitions. [2021-07-09 17:35:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:35:36,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:36,929 INFO L225 Difference]: With dead ends: 576 [2021-07-09 17:35:36,929 INFO L226 Difference]: Without dead ends: 566 [2021-07-09 17:35:36,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1605.0ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:35:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-09 17:35:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 380. [2021-07-09 17:35:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.1978891820580473) internal successors, (1212), 379 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1212 transitions. [2021-07-09 17:35:36,934 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1212 transitions. Word has length 18 [2021-07-09 17:35:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:36,934 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1212 transitions. [2021-07-09 17:35:36,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1212 transitions. [2021-07-09 17:35:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:36,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:36,935 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:37,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6771 [2021-07-09 17:35:37,136 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:37,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1159594402, now seen corresponding path program 245 times [2021-07-09 17:35:37,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:37,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970022313] [2021-07-09 17:35:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:37,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:37,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970022313] [2021-07-09 17:35:37,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970022313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:37,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562349354] [2021-07-09 17:35:37,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:37,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:37,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:37,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:37,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:37,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:37,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:37,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:37,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,515 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:35:37,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:37,516 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:35:37,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:37,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:37,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:37,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,892 INFO L628 ElimStorePlain]: treesize reduction 104, result has 47.2 percent of original size [2021-07-09 17:35:37,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:37,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:37,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:35:37,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:37,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:37,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:37,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:37,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:37,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:37,989 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:35:37,989 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1771 vanished before elimination [2021-07-09 17:35:37,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:37,990 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-07-09 17:35:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:38,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562349354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:38,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135602971] [2021-07-09 17:35:38,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:38,052 INFO L87 Difference]: Start difference. First operand 380 states and 1212 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,643 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-07-09 17:35:38,804 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-09 17:35:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:38,911 INFO L93 Difference]: Finished difference Result 546 states and 1667 transitions. [2021-07-09 17:35:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:38,912 INFO L225 Difference]: With dead ends: 546 [2021-07-09 17:35:38,912 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:35:38,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:35:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 376. [2021-07-09 17:35:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.2053333333333334) internal successors, (1202), 375 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1202 transitions. [2021-07-09 17:35:38,917 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1202 transitions. Word has length 18 [2021-07-09 17:35:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:38,917 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1202 transitions. [2021-07-09 17:35:38,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1202 transitions. [2021-07-09 17:35:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:38,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:38,918 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:39,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6789,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:39,118 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash 914447872, now seen corresponding path program 246 times [2021-07-09 17:35:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:39,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354882447] [2021-07-09 17:35:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:39,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354882447] [2021-07-09 17:35:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354882447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215602065] [2021-07-09 17:35:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:39,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:35:39,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:39,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:39,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:39,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:39,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,405 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-07-09 17:35:39,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:39,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-07-09 17:35:39,575 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:35:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:39,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:39,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:39,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:39,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:39,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:39,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,685 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-07-09 17:35:39,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:39,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:39,692 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:39,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:39,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:39,722 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-07-09 17:35:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:39,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215602065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:39,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548032479] [2021-07-09 17:35:39,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:39,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:39,780 INFO L87 Difference]: Start difference. First operand 376 states and 1202 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:40,294 INFO L93 Difference]: Finished difference Result 552 states and 1691 transitions. [2021-07-09 17:35:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:40,295 INFO L225 Difference]: With dead ends: 552 [2021-07-09 17:35:40,295 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:35:40,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:35:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 376. [2021-07-09 17:35:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.2053333333333334) internal successors, (1202), 375 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1202 transitions. [2021-07-09 17:35:40,300 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1202 transitions. Word has length 18 [2021-07-09 17:35:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:40,301 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1202 transitions. [2021-07-09 17:35:40,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1202 transitions. [2021-07-09 17:35:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:40,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:40,301 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:40,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6814,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:40,502 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:40,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1149555154, now seen corresponding path program 247 times [2021-07-09 17:35:40,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:40,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662357897] [2021-07-09 17:35:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:40,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662357897] [2021-07-09 17:35:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662357897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990609719] [2021-07-09 17:35:40,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:40,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:40,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:40,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:40,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:40,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:40,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:40,837 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-07-09 17:35:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:40,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:40,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:40,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:40,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:40,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:40,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:40,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:40,990 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:40,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:40,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:40,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:40,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,065 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-07-09 17:35:41,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:41,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:41,069 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:41,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:41,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:41,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:41,100 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-07-09 17:35:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:41,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990609719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:41,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:41,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:35:41,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923195470] [2021-07-09 17:35:41,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:35:41,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:35:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:35:41,215 INFO L87 Difference]: Start difference. First operand 376 states and 1202 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:41,839 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-07-09 17:35:42,038 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-07-09 17:35:42,258 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2021-07-09 17:35:42,418 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-09 17:35:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:42,467 INFO L93 Difference]: Finished difference Result 590 states and 1792 transitions. [2021-07-09 17:35:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:35:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:42,468 INFO L225 Difference]: With dead ends: 590 [2021-07-09 17:35:42,468 INFO L226 Difference]: Without dead ends: 582 [2021-07-09 17:35:42,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1289.1ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:35:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-09 17:35:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 377. [2021-07-09 17:35:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.199468085106383) internal successors, (1203), 376 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1203 transitions. [2021-07-09 17:35:42,474 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1203 transitions. Word has length 18 [2021-07-09 17:35:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:42,474 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1203 transitions. [2021-07-09 17:35:42,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1203 transitions. [2021-07-09 17:35:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:42,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:42,475 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:42,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6827 [2021-07-09 17:35:42,675 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -223531710, now seen corresponding path program 248 times [2021-07-09 17:35:42,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:42,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777520866] [2021-07-09 17:35:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:42,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:42,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777520866] [2021-07-09 17:35:42,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777520866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:42,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257978640] [2021-07-09 17:35:42,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:42,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:42,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:42,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:42,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:42,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:42,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:42,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:43,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:43,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:43,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:43,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,076 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:35:43,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:43,077 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:35:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:43,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:43,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:43,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:43,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:43,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:43,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:43,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:43,280 INFO L628 ElimStorePlain]: treesize reduction 196, result has 29.2 percent of original size [2021-07-09 17:35:43,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:43,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:43,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:43,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:43,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:43,317 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:59 [2021-07-09 17:35:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:43,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257978640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:43,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919678703] [2021-07-09 17:35:43,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:43,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:43,454 INFO L87 Difference]: Start difference. First operand 377 states and 1203 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,902 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-07-09 17:35:44,096 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-07-09 17:35:44,341 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-09 17:35:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:44,462 INFO L93 Difference]: Finished difference Result 546 states and 1664 transitions. [2021-07-09 17:35:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:44,463 INFO L225 Difference]: With dead ends: 546 [2021-07-09 17:35:44,463 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:35:44,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1151.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:35:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 375. [2021-07-09 17:35:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.2032085561497325) internal successors, (1198), 374 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1198 transitions. [2021-07-09 17:35:44,468 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1198 transitions. Word has length 18 [2021-07-09 17:35:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:44,468 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1198 transitions. [2021-07-09 17:35:44,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1198 transitions. [2021-07-09 17:35:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:44,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:44,469 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:44,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6842,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:44,669 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1257031384, now seen corresponding path program 249 times [2021-07-09 17:35:44,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:44,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484382595] [2021-07-09 17:35:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:44,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484382595] [2021-07-09 17:35:44,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484382595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242547543] [2021-07-09 17:35:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:44,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:44,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:44,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:44,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:44,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:44,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:44,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,016 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-07-09 17:35:45,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:45,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-07-09 17:35:45,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:45,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:45,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:45,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:45,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:45,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:45,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:45,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:45,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:45,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:45,124 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,193 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-07-09 17:35:45,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:45,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:45,196 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:45,199 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:45,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:45,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:45,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:45,229 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-07-09 17:35:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:45,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242547543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:45,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:45,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:45,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395884046] [2021-07-09 17:35:45,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:45,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:45,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:45,333 INFO L87 Difference]: Start difference. First operand 375 states and 1198 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,803 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-07-09 17:35:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:45,965 INFO L93 Difference]: Finished difference Result 559 states and 1694 transitions. [2021-07-09 17:35:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:45,966 INFO L225 Difference]: With dead ends: 559 [2021-07-09 17:35:45,966 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:35:45,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 674.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:35:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 375. [2021-07-09 17:35:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.2032085561497325) internal successors, (1198), 374 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1198 transitions. [2021-07-09 17:35:45,971 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1198 transitions. Word has length 18 [2021-07-09 17:35:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:45,971 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1198 transitions. [2021-07-09 17:35:45,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1198 transitions. [2021-07-09 17:35:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:45,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:45,971 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:46,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6857 [2021-07-09 17:35:46,172 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379806, now seen corresponding path program 250 times [2021-07-09 17:35:46,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:46,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219111503] [2021-07-09 17:35:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:46,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:46,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219111503] [2021-07-09 17:35:46,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219111503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657293413] [2021-07-09 17:35:46,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:46,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:46,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:46,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:46,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:46,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:46,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,526 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-07-09 17:35:46,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:46,527 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-07-09 17:35:46,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:46,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:46,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:46,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:46,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:46,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:46,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:46,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:46,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:46,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:46,634 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,701 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-07-09 17:35:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:46,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:46,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:46,707 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:46,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:46,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:46,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:46,737 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-07-09 17:35:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:46,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657293413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:46,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490860917] [2021-07-09 17:35:46,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:46,852 INFO L87 Difference]: Start difference. First operand 375 states and 1198 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,369 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-07-09 17:35:47,601 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-07-09 17:35:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:47,661 INFO L93 Difference]: Finished difference Result 542 states and 1651 transitions. [2021-07-09 17:35:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:47,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:47,662 INFO L225 Difference]: With dead ends: 542 [2021-07-09 17:35:47,662 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:35:47,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 910.8ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:35:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:35:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 375. [2021-07-09 17:35:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.200534759358289) internal successors, (1197), 374 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1197 transitions. [2021-07-09 17:35:47,667 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1197 transitions. Word has length 18 [2021-07-09 17:35:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:47,668 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1197 transitions. [2021-07-09 17:35:47,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1197 transitions. [2021-07-09 17:35:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:47,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:47,668 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:47,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6870 [2021-07-09 17:35:47,869 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1815558674, now seen corresponding path program 251 times [2021-07-09 17:35:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:47,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168784907] [2021-07-09 17:35:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168784907] [2021-07-09 17:35:48,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168784907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978934576] [2021-07-09 17:35:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:48,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:48,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:48,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:48,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:48,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:48,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:48,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:48,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,357 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-09 17:35:48,357 INFO L628 ElimStorePlain]: treesize reduction 59, result has 78.3 percent of original size [2021-07-09 17:35:48,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:48,364 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:238, output treesize:213 [2021-07-09 17:35:48,636 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-07-09 17:35:48,728 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-07-09 17:35:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:48,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:48,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:48,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:48,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:48,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:48,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:48,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:48,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:35:48,782 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:48,790 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:48,797 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:48,803 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:48,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:48,815 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:48,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:35:48,821 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,027 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2021-07-09 17:35:49,027 INFO L628 ElimStorePlain]: treesize reduction 250, result has 44.7 percent of original size [2021-07-09 17:35:49,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:49,032 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:49,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:49,037 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:49,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:49,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:35:49,119 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:655, output treesize:120 [2021-07-09 17:35:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:49,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978934576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:49,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:49,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801576694] [2021-07-09 17:35:49,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:49,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:49,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:49,262 INFO L87 Difference]: Start difference. First operand 375 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,644 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-07-09 17:35:50,022 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2021-07-09 17:35:50,377 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2021-07-09 17:35:50,765 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 109 [2021-07-09 17:35:50,965 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-07-09 17:35:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:51,012 INFO L93 Difference]: Finished difference Result 551 states and 1677 transitions. [2021-07-09 17:35:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:51,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:51,014 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:35:51,014 INFO L226 Difference]: Without dead ends: 545 [2021-07-09 17:35:51,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1866.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-09 17:35:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 375. [2021-07-09 17:35:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.200534759358289) internal successors, (1197), 374 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1197 transitions. [2021-07-09 17:35:51,019 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1197 transitions. Word has length 18 [2021-07-09 17:35:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:51,019 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1197 transitions. [2021-07-09 17:35:51,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1197 transitions. [2021-07-09 17:35:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:51,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:51,019 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:51,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6883 [2021-07-09 17:35:51,220 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:51,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash -997760802, now seen corresponding path program 252 times [2021-07-09 17:35:51,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:51,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908135103] [2021-07-09 17:35:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:51,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:51,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908135103] [2021-07-09 17:35:51,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908135103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196099657] [2021-07-09 17:35:51,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:51,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:51,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:51,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:51,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:51,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:51,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:51,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:51,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,619 INFO L628 ElimStorePlain]: treesize reduction 68, result has 59.8 percent of original size [2021-07-09 17:35:51,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:51,621 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:235, output treesize:101 [2021-07-09 17:35:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:51,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:51,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:51,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:51,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:51,849 INFO L628 ElimStorePlain]: treesize reduction 216, result has 29.4 percent of original size [2021-07-09 17:35:51,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:35:51,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:51,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:51,880 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:35:51,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:51,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:51,912 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1782 vanished before elimination [2021-07-09 17:35:51,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:35:51,913 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:278, output treesize:61 [2021-07-09 17:35:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:52,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196099657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:52,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:52,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485524033] [2021-07-09 17:35:52,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:52,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:52,035 INFO L87 Difference]: Start difference. First operand 375 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,367 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-07-09 17:35:52,577 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-07-09 17:35:52,811 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-09 17:35:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:53,101 INFO L93 Difference]: Finished difference Result 554 states and 1688 transitions. [2021-07-09 17:35:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:53,102 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:35:53,102 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:35:53,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:35:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:35:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 374. [2021-07-09 17:35:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.193029490616622) internal successors, (1191), 373 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1191 transitions. [2021-07-09 17:35:53,107 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1191 transitions. Word has length 18 [2021-07-09 17:35:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:53,107 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1191 transitions. [2021-07-09 17:35:53,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1191 transitions. [2021-07-09 17:35:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:53,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:53,108 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:53,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6900,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:53,308 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1277703096, now seen corresponding path program 253 times [2021-07-09 17:35:53,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:53,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877165498] [2021-07-09 17:35:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:53,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:53,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877165498] [2021-07-09 17:35:53,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877165498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166662057] [2021-07-09 17:35:53,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:35:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:53,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:35:53,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:53,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:35:53,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:35:53,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:35:53,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:53,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,710 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-09 17:35:53,710 INFO L628 ElimStorePlain]: treesize reduction 59, result has 78.3 percent of original size [2021-07-09 17:35:53,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:35:53,716 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:238, output treesize:213 [2021-07-09 17:35:53,957 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-07-09 17:35:54,171 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-07-09 17:35:54,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:54,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:54,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:54,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:54,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:54,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:54,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:54,234 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:54,238 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:54,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:54,249 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:54,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:54,259 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:54,264 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:54,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,412 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2021-07-09 17:35:54,413 INFO L628 ElimStorePlain]: treesize reduction 182, result has 45.7 percent of original size [2021-07-09 17:35:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:54,418 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:54,422 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:54,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:54,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:35:54,478 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:499, output treesize:56 [2021-07-09 17:35:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166662057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:54,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:54,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643868552] [2021-07-09 17:35:54,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:54,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:54,563 INFO L87 Difference]: Start difference. First operand 374 states and 1191 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,053 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-07-09 17:35:55,399 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 118 [2021-07-09 17:35:55,606 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2021-07-09 17:35:55,752 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-07-09 17:35:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:55,798 INFO L93 Difference]: Finished difference Result 538 states and 1636 transitions. [2021-07-09 17:35:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:35:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:55,800 INFO L225 Difference]: With dead ends: 538 [2021-07-09 17:35:55,800 INFO L226 Difference]: Without dead ends: 532 [2021-07-09 17:35:55,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1423.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:35:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-09 17:35:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 374. [2021-07-09 17:35:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.193029490616622) internal successors, (1191), 373 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1191 transitions. [2021-07-09 17:35:55,804 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1191 transitions. Word has length 18 [2021-07-09 17:35:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:55,804 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1191 transitions. [2021-07-09 17:35:55,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1191 transitions. [2021-07-09 17:35:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:55,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:55,805 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:56,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6918,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:56,005 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash 910480080, now seen corresponding path program 254 times [2021-07-09 17:35:56,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:56,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688596381] [2021-07-09 17:35:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:56,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688596381] [2021-07-09 17:35:56,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688596381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777659623] [2021-07-09 17:35:56,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:56,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:56,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:56,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:56,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:35:56,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:56,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:56,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:56,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:56,326 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:125, output treesize:115 [2021-07-09 17:35:56,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:35:56,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:56,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:35:56,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:35:56,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:56,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,473 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:35:56,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:56,482 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,544 INFO L628 ElimStorePlain]: treesize reduction 61, result has 58.5 percent of original size [2021-07-09 17:35:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:56,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:35:56,548 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:56,550 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:56,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:56,578 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:359, output treesize:64 [2021-07-09 17:35:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777659623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:56,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:35:56,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813156336] [2021-07-09 17:35:56,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:35:56,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:35:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:35:56,693 INFO L87 Difference]: Start difference. First operand 374 states and 1191 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:57,071 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-09 17:35:57,262 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-09 17:35:57,422 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-07-09 17:35:57,651 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-07-09 17:35:57,817 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-07-09 17:35:58,043 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-07-09 17:35:58,246 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-07-09 17:35:58,498 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2021-07-09 17:35:58,705 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 17:35:58,915 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-07-09 17:35:59,152 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-07-09 17:35:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:59,225 INFO L93 Difference]: Finished difference Result 564 states and 1708 transitions. [2021-07-09 17:35:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:35:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:59,227 INFO L225 Difference]: With dead ends: 564 [2021-07-09 17:35:59,227 INFO L226 Difference]: Without dead ends: 558 [2021-07-09 17:35:59,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2404.1ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-09 17:35:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 372. [2021-07-09 17:35:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.1994609164420487) internal successors, (1187), 371 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1187 transitions. [2021-07-09 17:35:59,232 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1187 transitions. Word has length 18 [2021-07-09 17:35:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:59,232 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1187 transitions. [2021-07-09 17:35:59,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1187 transitions. [2021-07-09 17:35:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:35:59,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:59,232 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:59,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6934 [2021-07-09 17:35:59,433 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:59,433 INFO L82 PathProgramCache]: Analyzing trace with hash 903035708, now seen corresponding path program 255 times [2021-07-09 17:35:59,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:59,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745052889] [2021-07-09 17:35:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:59,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745052889] [2021-07-09 17:35:59,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745052889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811837449] [2021-07-09 17:35:59,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:59,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:35:59,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:35:59,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:59,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:59,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:35:59,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:59,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:59,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:35:59,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:59,717 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,767 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-07-09 17:35:59,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:59,768 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-07-09 17:35:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:35:59,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:35:59,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:59,943 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:35:59,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:35:59,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:59,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:59,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:35:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:59,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811837449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:59,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:35:59,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226665176] [2021-07-09 17:35:59,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:35:59,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:59,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:35:59,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:35:59,973 INFO L87 Difference]: Start difference. First operand 372 states and 1187 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:00,375 INFO L93 Difference]: Finished difference Result 484 states and 1467 transitions. [2021-07-09 17:36:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:00,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:00,376 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:36:00,376 INFO L226 Difference]: Without dead ends: 478 [2021-07-09 17:36:00,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-09 17:36:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 380. [2021-07-09 17:36:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.1978891820580473) internal successors, (1212), 379 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1212 transitions. [2021-07-09 17:36:00,381 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1212 transitions. Word has length 18 [2021-07-09 17:36:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:00,381 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1212 transitions. [2021-07-09 17:36:00,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1212 transitions. [2021-07-09 17:36:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:00,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:00,381 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:00,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6948,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,582 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash 858781830, now seen corresponding path program 256 times [2021-07-09 17:36:00,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:00,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535398932] [2021-07-09 17:36:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:00,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535398932] [2021-07-09 17:36:00,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535398932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94998954] [2021-07-09 17:36:00,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:00,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:00,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:00,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:00,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:00,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:00,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:00,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:00,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:00,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:00,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:00,910 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:00,914 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:00,918 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:00,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:00,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,001 INFO L628 ElimStorePlain]: treesize reduction 121, result has 51.2 percent of original size [2021-07-09 17:36:01,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-07-09 17:36:01,007 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:287, output treesize:127 [2021-07-09 17:36:01,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:01,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:01,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:01,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:01,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:01,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:01,376 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:01,382 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:01,388 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:01,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:01,399 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:01,405 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:01,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,558 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-07-09 17:36:01,558 INFO L628 ElimStorePlain]: treesize reduction 122, result has 52.0 percent of original size [2021-07-09 17:36:01,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:01,563 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:36:01,567 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:01,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:36:01,622 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:405, output treesize:58 [2021-07-09 17:36:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:01,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94998954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:01,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:01,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:01,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004054999] [2021-07-09 17:36:01,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:01,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:01,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:01,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:01,710 INFO L87 Difference]: Start difference. First operand 380 states and 1212 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,698 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-07-09 17:36:03,099 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 104 [2021-07-09 17:36:03,289 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-07-09 17:36:03,594 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-07-09 17:36:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:03,712 INFO L93 Difference]: Finished difference Result 612 states and 1826 transitions. [2021-07-09 17:36:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:36:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:03,713 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:36:03,713 INFO L226 Difference]: Without dead ends: 575 [2021-07-09 17:36:03,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1800.6ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:36:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-07-09 17:36:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 406. [2021-07-09 17:36:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.167901234567901) internal successors, (1283), 405 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2021-07-09 17:36:03,721 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 18 [2021-07-09 17:36:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:03,721 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2021-07-09 17:36:03,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2021-07-09 17:36:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:03,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:03,722 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:03,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6962,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,922 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1046030646, now seen corresponding path program 257 times [2021-07-09 17:36:03,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:03,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430232252] [2021-07-09 17:36:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:04,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430232252] [2021-07-09 17:36:04,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430232252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504045090] [2021-07-09 17:36:04,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:04,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:04,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:04,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:04,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:04,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:04,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:04,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:04,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,242 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-07-09 17:36:04,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:04,243 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-07-09 17:36:04,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:04,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:04,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,434 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:36:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:04,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:04,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:04,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:04,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:04,444 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:36:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504045090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:04,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:36:04,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943486642] [2021-07-09 17:36:04,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:04,465 INFO L87 Difference]: Start difference. First operand 406 states and 1283 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:04,821 INFO L93 Difference]: Finished difference Result 487 states and 1493 transitions. [2021-07-09 17:36:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:04,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:04,822 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:36:04,823 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 17:36:04,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 17:36:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 408. [2021-07-09 17:36:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.1646191646191646) internal successors, (1288), 407 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2021-07-09 17:36:04,827 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 18 [2021-07-09 17:36:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:04,827 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2021-07-09 17:36:04,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2021-07-09 17:36:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:04,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:04,828 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:05,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-07-09 17:36:05,029 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 435207224, now seen corresponding path program 258 times [2021-07-09 17:36:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:05,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741694381] [2021-07-09 17:36:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:05,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741694381] [2021-07-09 17:36:05,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741694381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164249434] [2021-07-09 17:36:05,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:05,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:05,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:05,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:05,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:05,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:05,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:05,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:05,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:05,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,334 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-07-09 17:36:05,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:05,335 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-07-09 17:36:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:05,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:05,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:05,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:05,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:05,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:05,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:05,444 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:05,448 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,497 INFO L628 ElimStorePlain]: treesize reduction 57, result has 56.8 percent of original size [2021-07-09 17:36:05,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:05,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:05,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:05,503 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:05,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:05,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:05,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:05,531 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:194, output treesize:53 [2021-07-09 17:36:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164249434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:05,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:36:05,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422478256] [2021-07-09 17:36:05,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:05,593 INFO L87 Difference]: Start difference. First operand 408 states and 1288 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:06,033 INFO L93 Difference]: Finished difference Result 486 states and 1491 transitions. [2021-07-09 17:36:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:06,034 INFO L225 Difference]: With dead ends: 486 [2021-07-09 17:36:06,034 INFO L226 Difference]: Without dead ends: 478 [2021-07-09 17:36:06,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-09 17:36:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 403. [2021-07-09 17:36:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.174129353233831) internal successors, (1276), 402 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1276 transitions. [2021-07-09 17:36:06,039 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1276 transitions. Word has length 18 [2021-07-09 17:36:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:06,040 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1276 transitions. [2021-07-09 17:36:06,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1276 transitions. [2021-07-09 17:36:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:06,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:06,040 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:06,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7030,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:06,241 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2119116026, now seen corresponding path program 259 times [2021-07-09 17:36:06,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:06,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005064699] [2021-07-09 17:36:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:06,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005064699] [2021-07-09 17:36:06,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005064699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280678297] [2021-07-09 17:36:06,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:06,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:06,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:06,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:06,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:06,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:06,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:06,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,676 INFO L628 ElimStorePlain]: treesize reduction 55, result has 60.4 percent of original size [2021-07-09 17:36:06,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:06,677 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:199, output treesize:84 [2021-07-09 17:36:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:06,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:06,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,835 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-07-09 17:36:06,835 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:06,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:06,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:06,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:06,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:06,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:06,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:06,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:06,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:06,880 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:36:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280678297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:06,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:06,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833827304] [2021-07-09 17:36:06,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:06,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:06,902 INFO L87 Difference]: Start difference. First operand 403 states and 1276 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,784 INFO L93 Difference]: Finished difference Result 487 states and 1506 transitions. [2021-07-09 17:36:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:07,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,786 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:36:07,786 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 17:36:07,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 17:36:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 409. [2021-07-09 17:36:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.178921568627451) internal successors, (1297), 408 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1297 transitions. [2021-07-09 17:36:07,791 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1297 transitions. Word has length 18 [2021-07-09 17:36:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,791 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1297 transitions. [2021-07-09 17:36:07,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1297 transitions. [2021-07-09 17:36:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:07,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,791 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:08,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7042,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:08,007 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash 567267000, now seen corresponding path program 260 times [2021-07-09 17:36:08,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:08,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861784400] [2021-07-09 17:36:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861784400] [2021-07-09 17:36:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861784400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274584476] [2021-07-09 17:36:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:08,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:08,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:08,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:08,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:08,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:08,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:08,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:08,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:08,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:08,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:08,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:08,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,438 INFO L628 ElimStorePlain]: treesize reduction 46, result has 75.5 percent of original size [2021-07-09 17:36:08,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-07-09 17:36:08,443 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:221, output treesize:142 [2021-07-09 17:36:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:08,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:08,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:08,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:08,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:08,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:08,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:08,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:08,734 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:08,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:08,744 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:08,749 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:08,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,864 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-09 17:36:08,864 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-07-09 17:36:08,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:08,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:08,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:36:08,872 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:08,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:08,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:36:08,913 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-07-09 17:36:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274584476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:08,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:08,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529611665] [2021-07-09 17:36:08,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:08,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:08,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:08,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:08,988 INFO L87 Difference]: Start difference. First operand 409 states and 1297 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:09,951 INFO L93 Difference]: Finished difference Result 514 states and 1557 transitions. [2021-07-09 17:36:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:09,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:09,953 INFO L225 Difference]: With dead ends: 514 [2021-07-09 17:36:09,953 INFO L226 Difference]: Without dead ends: 485 [2021-07-09 17:36:09,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 957.5ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:36:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-09 17:36:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 417. [2021-07-09 17:36:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.175480769230769) internal successors, (1321), 416 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1321 transitions. [2021-07-09 17:36:09,958 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1321 transitions. Word has length 18 [2021-07-09 17:36:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:09,958 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1321 transitions. [2021-07-09 17:36:09,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1321 transitions. [2021-07-09 17:36:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:09,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:09,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:10,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7056 [2021-07-09 17:36:10,159 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash -637878156, now seen corresponding path program 261 times [2021-07-09 17:36:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:10,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762536590] [2021-07-09 17:36:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762536590] [2021-07-09 17:36:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762536590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203343269] [2021-07-09 17:36:10,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:10,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:10,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:10,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:10,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:10,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:10,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:10,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:10,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:10,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:10,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,524 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:36:10,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:10,525 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:193, output treesize:81 [2021-07-09 17:36:10,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:10,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:10,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,635 INFO L628 ElimStorePlain]: treesize reduction 92, result has 43.6 percent of original size [2021-07-09 17:36:10,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:10,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:10,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:10,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,686 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1805 vanished before elimination [2021-07-09 17:36:10,686 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1807 vanished before elimination [2021-07-09 17:36:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:10,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:10,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:10,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:10,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:10,718 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:53 [2021-07-09 17:36:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203343269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:10,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:36:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383625707] [2021-07-09 17:36:10,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:10,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:10,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:10,777 INFO L87 Difference]: Start difference. First operand 417 states and 1321 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:11,240 INFO L93 Difference]: Finished difference Result 467 states and 1457 transitions. [2021-07-09 17:36:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:11,241 INFO L225 Difference]: With dead ends: 467 [2021-07-09 17:36:11,241 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 17:36:11,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:36:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 17:36:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 419. [2021-07-09 17:36:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.172248803827751) internal successors, (1326), 418 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1326 transitions. [2021-07-09 17:36:11,245 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1326 transitions. Word has length 18 [2021-07-09 17:36:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:11,246 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1326 transitions. [2021-07-09 17:36:11,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1326 transitions. [2021-07-09 17:36:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:11,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:11,246 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:11,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7104 [2021-07-09 17:36:11,447 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1954035460, now seen corresponding path program 262 times [2021-07-09 17:36:11,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:11,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025574253] [2021-07-09 17:36:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025574253] [2021-07-09 17:36:11,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025574253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203188852] [2021-07-09 17:36:11,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:11,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:11,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:11,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:11,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:11,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:11,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:11,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:11,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:11,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:11,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:11,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:11,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:36:12,035 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:191, output treesize:167 [2021-07-09 17:36:12,200 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-07-09 17:36:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:12,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:12,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:12,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:36:12,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:12,228 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:36:12,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:12,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:12,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:36:12,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:12,255 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:12,260 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:12,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,405 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-09 17:36:12,406 INFO L628 ElimStorePlain]: treesize reduction 120, result has 57.7 percent of original size [2021-07-09 17:36:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:12,410 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:12,415 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:12,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:36:12,419 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:12,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:36:12,471 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:429, output treesize:85 [2021-07-09 17:36:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203188852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695175511] [2021-07-09 17:36:12,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:12,567 INFO L87 Difference]: Start difference. First operand 419 states and 1326 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,127 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-07-09 17:36:13,514 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2021-07-09 17:36:13,649 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-07-09 17:36:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:13,926 INFO L93 Difference]: Finished difference Result 518 states and 1588 transitions. [2021-07-09 17:36:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:13,927 INFO L225 Difference]: With dead ends: 518 [2021-07-09 17:36:13,927 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:36:13,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1309.2ms TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:36:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 425. [2021-07-09 17:36:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.1910377358490565) internal successors, (1353), 424 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1353 transitions. [2021-07-09 17:36:13,933 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1353 transitions. Word has length 18 [2021-07-09 17:36:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:13,933 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1353 transitions. [2021-07-09 17:36:13,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1353 transitions. [2021-07-09 17:36:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:13,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:13,933 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:14,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7116,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:14,134 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash -758999286, now seen corresponding path program 263 times [2021-07-09 17:36:14,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:14,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237831734] [2021-07-09 17:36:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:14,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:14,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237831734] [2021-07-09 17:36:14,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237831734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625283430] [2021-07-09 17:36:14,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:14,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:14,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:14,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:14,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:14,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:14,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:14,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:14,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,708 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-09 17:36:14,708 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-07-09 17:36:14,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:36:14,713 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:243, output treesize:173 [2021-07-09 17:36:14,922 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1825, array_4], 6=[v_prenex_1824, array_2]} [2021-07-09 17:36:14,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:14,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:14,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:14,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,009 INFO L628 ElimStorePlain]: treesize reduction 172, result has 36.3 percent of original size [2021-07-09 17:36:15,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:15,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:15,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1824 vanished before elimination [2021-07-09 17:36:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:36:15,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:15,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:15,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:15,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:15,091 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:291, output treesize:51 [2021-07-09 17:36:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625283430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:15,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:15,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979718378] [2021-07-09 17:36:15,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:15,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:15,159 INFO L87 Difference]: Start difference. First operand 425 states and 1353 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:15,953 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-07-09 17:36:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:16,507 INFO L93 Difference]: Finished difference Result 526 states and 1614 transitions. [2021-07-09 17:36:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:36:16,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:16,509 INFO L225 Difference]: With dead ends: 526 [2021-07-09 17:36:16,509 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:36:16,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1237.1ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:36:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:36:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 433. [2021-07-09 17:36:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.201388888888889) internal successors, (1383), 432 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1383 transitions. [2021-07-09 17:36:16,518 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1383 transitions. Word has length 18 [2021-07-09 17:36:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:16,518 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1383 transitions. [2021-07-09 17:36:16,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1383 transitions. [2021-07-09 17:36:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:16,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:16,519 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:16,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7145 [2021-07-09 17:36:16,719 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 722238584, now seen corresponding path program 264 times [2021-07-09 17:36:16,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:16,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194760296] [2021-07-09 17:36:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:16,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:16,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194760296] [2021-07-09 17:36:16,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194760296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:16,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843508834] [2021-07-09 17:36:16,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:16,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:17,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:17,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:17,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:17,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:17,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:17,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:17,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,231 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-09 17:36:17,231 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-07-09 17:36:17,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:36:17,236 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:243, output treesize:173 [2021-07-09 17:36:17,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:17,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:17,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:17,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,498 INFO L628 ElimStorePlain]: treesize reduction 78, result has 50.0 percent of original size [2021-07-09 17:36:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:36:17,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:17,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:17,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:17,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:17,533 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:17,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:17,550 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:17,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:17,551 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:154, output treesize:22 [2021-07-09 17:36:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843508834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:17,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:17,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279766556] [2021-07-09 17:36:17,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:17,577 INFO L87 Difference]: Start difference. First operand 433 states and 1383 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,299 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-07-09 17:36:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:19,010 INFO L93 Difference]: Finished difference Result 521 states and 1625 transitions. [2021-07-09 17:36:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:36:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:19,011 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:36:19,011 INFO L226 Difference]: Without dead ends: 507 [2021-07-09 17:36:19,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1249.6ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:36:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-09 17:36:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 426. [2021-07-09 17:36:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2141176470588237) internal successors, (1366), 425 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1366 transitions. [2021-07-09 17:36:19,016 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1366 transitions. Word has length 18 [2021-07-09 17:36:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:19,016 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1366 transitions. [2021-07-09 17:36:19,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1366 transitions. [2021-07-09 17:36:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:19,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:19,017 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:19,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7167 [2021-07-09 17:36:19,217 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1742014878, now seen corresponding path program 265 times [2021-07-09 17:36:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:19,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292768667] [2021-07-09 17:36:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292768667] [2021-07-09 17:36:19,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292768667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531388129] [2021-07-09 17:36:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:19,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:19,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:19,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:19,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:19,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:19,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:19,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:19,424 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.6 percent of original size [2021-07-09 17:36:19,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:19,425 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-07-09 17:36:19,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:19,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:19,511 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:36:19,511 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:19,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:19,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:36:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531388129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:19,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:36:19,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481119315] [2021-07-09 17:36:19,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:36:19,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:19,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:36:19,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:36:19,530 INFO L87 Difference]: Start difference. First operand 426 states and 1366 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:19,905 INFO L93 Difference]: Finished difference Result 551 states and 1707 transitions. [2021-07-09 17:36:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:19,906 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:36:19,906 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:36:19,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:36:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 430. [2021-07-09 17:36:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.230769230769231) internal successors, (1386), 429 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1386 transitions. [2021-07-09 17:36:19,911 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1386 transitions. Word has length 18 [2021-07-09 17:36:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:19,911 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1386 transitions. [2021-07-09 17:36:19,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1386 transitions. [2021-07-09 17:36:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:19,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:19,912 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:20,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7200,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:20,113 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:20,113 INFO L82 PathProgramCache]: Analyzing trace with hash -885518932, now seen corresponding path program 266 times [2021-07-09 17:36:20,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:20,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647699752] [2021-07-09 17:36:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647699752] [2021-07-09 17:36:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647699752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5307473] [2021-07-09 17:36:20,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:20,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:20,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:20,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:20,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:20,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:20,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:20,359 INFO L628 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2021-07-09 17:36:20,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:20,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:109, output treesize:56 [2021-07-09 17:36:20,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:20,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:20,469 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:36:20,469 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:20,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:20,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:36:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5307473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:20,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:36:20,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609911017] [2021-07-09 17:36:20,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:36:20,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:20,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:36:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:36:20,488 INFO L87 Difference]: Start difference. First operand 430 states and 1386 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:20,823 INFO L93 Difference]: Finished difference Result 548 states and 1703 transitions. [2021-07-09 17:36:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:20,824 INFO L225 Difference]: With dead ends: 548 [2021-07-09 17:36:20,824 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:36:20,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:36:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 433. [2021-07-09 17:36:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.236111111111111) internal successors, (1398), 432 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1398 transitions. [2021-07-09 17:36:20,829 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1398 transitions. Word has length 18 [2021-07-09 17:36:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:20,829 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1398 transitions. [2021-07-09 17:36:20,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1398 transitions. [2021-07-09 17:36:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:20,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:20,830 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:21,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7206,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,031 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:21,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1469459618, now seen corresponding path program 267 times [2021-07-09 17:36:21,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:21,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044192084] [2021-07-09 17:36:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044192084] [2021-07-09 17:36:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044192084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407082447] [2021-07-09 17:36:21,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:21,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:21,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:21,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:21,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:21,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:21,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,249 INFO L628 ElimStorePlain]: treesize reduction 26, result has 68.3 percent of original size [2021-07-09 17:36:21,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:21,250 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:109, output treesize:56 [2021-07-09 17:36:21,329 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1838], 1=[v_prenex_1839, array_4]} [2021-07-09 17:36:21,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:21,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:21,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,372 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-07-09 17:36:21,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:21,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:21,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:21,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:21,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:21,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:21,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:21,419 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:21,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:21,420 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:153, output treesize:44 [2021-07-09 17:36:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407082447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:21,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:36:21,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034772984] [2021-07-09 17:36:21,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:36:21,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:36:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:36:21,477 INFO L87 Difference]: Start difference. First operand 433 states and 1398 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:21,907 INFO L93 Difference]: Finished difference Result 554 states and 1727 transitions. [2021-07-09 17:36:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:21,909 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:36:21,909 INFO L226 Difference]: Without dead ends: 549 [2021-07-09 17:36:21,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-09 17:36:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 420. [2021-07-09 17:36:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.2195704057279237) internal successors, (1349), 419 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1349 transitions. [2021-07-09 17:36:21,914 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1349 transitions. Word has length 18 [2021-07-09 17:36:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:21,914 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1349 transitions. [2021-07-09 17:36:21,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:21,914 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1349 transitions. [2021-07-09 17:36:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:21,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:21,915 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:22,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7213 [2021-07-09 17:36:22,116 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash 603886064, now seen corresponding path program 268 times [2021-07-09 17:36:22,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:22,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420571996] [2021-07-09 17:36:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:22,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420571996] [2021-07-09 17:36:22,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420571996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259297722] [2021-07-09 17:36:22,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:22,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:22,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:22,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:22,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:22,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:22,385 INFO L628 ElimStorePlain]: treesize reduction 33, result has 63.7 percent of original size [2021-07-09 17:36:22,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:22,385 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-07-09 17:36:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:22,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:22,462 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-07-09 17:36:22,462 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:22,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:22,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-07-09 17:36:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259297722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:22,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:36:22,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15684812] [2021-07-09 17:36:22,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:36:22,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:22,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:36:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:36:22,480 INFO L87 Difference]: Start difference. First operand 420 states and 1349 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:22,764 INFO L93 Difference]: Finished difference Result 509 states and 1598 transitions. [2021-07-09 17:36:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:22,765 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:36:22,765 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:36:22,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:36:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 432. [2021-07-09 17:36:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.222737819025522) internal successors, (1389), 431 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1389 transitions. [2021-07-09 17:36:22,770 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1389 transitions. Word has length 18 [2021-07-09 17:36:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:22,770 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1389 transitions. [2021-07-09 17:36:22,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1389 transitions. [2021-07-09 17:36:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:22,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:22,771 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:22,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7226,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:22,972 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1336102682, now seen corresponding path program 269 times [2021-07-09 17:36:22,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:22,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612830654] [2021-07-09 17:36:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:23,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612830654] [2021-07-09 17:36:23,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612830654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771029034] [2021-07-09 17:36:23,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:23,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:23,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:23,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:23,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:23,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:23,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-07-09 17:36:23,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:23,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:23,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:23,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:23,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,346 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:36:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:23,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:23,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:23,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:36:23,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:23,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:23,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:23,396 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-07-09 17:36:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771029034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:23,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:36:23,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769997000] [2021-07-09 17:36:23,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:23,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:23,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:23,471 INFO L87 Difference]: Start difference. First operand 432 states and 1389 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:23,917 INFO L93 Difference]: Finished difference Result 513 states and 1615 transitions. [2021-07-09 17:36:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:23,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:23,918 INFO L225 Difference]: With dead ends: 513 [2021-07-09 17:36:23,919 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:36:23,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:36:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 426. [2021-07-09 17:36:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.216470588235294) internal successors, (1367), 425 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1367 transitions. [2021-07-09 17:36:23,924 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1367 transitions. Word has length 18 [2021-07-09 17:36:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:23,924 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1367 transitions. [2021-07-09 17:36:23,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1367 transitions. [2021-07-09 17:36:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:23,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:23,925 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:24,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7235 [2021-07-09 17:36:24,125 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2085123934, now seen corresponding path program 270 times [2021-07-09 17:36:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664460630] [2021-07-09 17:36:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:24,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:24,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664460630] [2021-07-09 17:36:24,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664460630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:24,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290165075] [2021-07-09 17:36:24,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:24,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:24,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:24,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:24,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:24,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:24,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:36:24,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-07-09 17:36:24,436 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:36:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:24,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:24,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:24,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:24,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:24,522 INFO L628 ElimStorePlain]: treesize reduction 83, result has 51.5 percent of original size [2021-07-09 17:36:24,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:24,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:24,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:24,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:24,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:24,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:24,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:24,563 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:181, output treesize:38 [2021-07-09 17:36:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:24,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290165075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:24,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:24,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:36:24,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326768343] [2021-07-09 17:36:24,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:24,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:24,622 INFO L87 Difference]: Start difference. First operand 426 states and 1367 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:25,138 INFO L93 Difference]: Finished difference Result 521 states and 1641 transitions. [2021-07-09 17:36:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:36:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:25,139 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:36:25,139 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:36:25,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:36:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 415. [2021-07-09 17:36:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2222222222222223) internal successors, (1334), 414 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1334 transitions. [2021-07-09 17:36:25,144 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1334 transitions. Word has length 18 [2021-07-09 17:36:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:25,144 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1334 transitions. [2021-07-09 17:36:25,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1334 transitions. [2021-07-09 17:36:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:25,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:25,145 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:25,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7247 [2021-07-09 17:36:25,345 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:25,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1483849440, now seen corresponding path program 271 times [2021-07-09 17:36:25,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:25,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591593471] [2021-07-09 17:36:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591593471] [2021-07-09 17:36:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591593471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19118650] [2021-07-09 17:36:25,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:25,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:25,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:25,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:25,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:25,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,652 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:36:25,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:25,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-07-09 17:36:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:25,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:25,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:25,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,905 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-07-09 17:36:25,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:25,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:25,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:25,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:25,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:25,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:25,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1843 vanished before elimination [2021-07-09 17:36:25,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:25,948 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:36:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19118650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:25,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214733656] [2021-07-09 17:36:25,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:25,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:25,971 INFO L87 Difference]: Start difference. First operand 415 states and 1334 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,395 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-09 17:36:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:26,704 INFO L93 Difference]: Finished difference Result 586 states and 1779 transitions. [2021-07-09 17:36:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:26,705 INFO L225 Difference]: With dead ends: 586 [2021-07-09 17:36:26,705 INFO L226 Difference]: Without dead ends: 580 [2021-07-09 17:36:26,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-07-09 17:36:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 418. [2021-07-09 17:36:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.2158273381294964) internal successors, (1341), 417 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1341 transitions. [2021-07-09 17:36:26,711 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1341 transitions. Word has length 18 [2021-07-09 17:36:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:26,711 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1341 transitions. [2021-07-09 17:36:26,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1341 transitions. [2021-07-09 17:36:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:26,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:26,712 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:26,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7258 [2021-07-09 17:36:26,912 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 862051502, now seen corresponding path program 272 times [2021-07-09 17:36:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061447434] [2021-07-09 17:36:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:27,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061447434] [2021-07-09 17:36:27,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061447434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339974306] [2021-07-09 17:36:27,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:27,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:27,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:27,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:27,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:27,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,371 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-07-09 17:36:27,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:27,372 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-07-09 17:36:27,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:27,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:27,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:27,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,608 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:36:27,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:27,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:27,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:27,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:27,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:27,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:36:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339974306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:27,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376697116] [2021-07-09 17:36:27,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:27,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:27,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:27,639 INFO L87 Difference]: Start difference. First operand 418 states and 1341 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,025 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-07-09 17:36:28,182 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-09 17:36:28,359 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2021-07-09 17:36:28,597 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-07-09 17:36:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:28,904 INFO L93 Difference]: Finished difference Result 645 states and 1951 transitions. [2021-07-09 17:36:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:36:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:28,905 INFO L225 Difference]: With dead ends: 645 [2021-07-09 17:36:28,905 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:36:28,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1309.7ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:36:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 429. [2021-07-09 17:36:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.235981308411215) internal successors, (1385), 428 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1385 transitions. [2021-07-09 17:36:28,911 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1385 transitions. Word has length 18 [2021-07-09 17:36:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:28,911 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1385 transitions. [2021-07-09 17:36:28,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1385 transitions. [2021-07-09 17:36:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:28,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:28,912 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:29,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7271,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:29,112 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash -746532768, now seen corresponding path program 273 times [2021-07-09 17:36:29,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:29,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898344127] [2021-07-09 17:36:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:29,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898344127] [2021-07-09 17:36:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898344127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696402220] [2021-07-09 17:36:29,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:29,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:29,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:36:29,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:36:29,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:36:29,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:29,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:29,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:29,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,476 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:36:29,477 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-07-09 17:36:29,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:29,478 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-07-09 17:36:29,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:29,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:29,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:29,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:29,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:29,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:29,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:29,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:29,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:29,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:30,002 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:30,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:30,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:30,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:30,026 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:30,031 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:30,037 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:30,041 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,187 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-07-09 17:36:30,187 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:36:30,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:30,203 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:30,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:30,207 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:30,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:30,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:36:30,266 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:36:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696402220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:30,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:30,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57071746] [2021-07-09 17:36:30,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:30,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:30,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:30,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:30,349 INFO L87 Difference]: Start difference. First operand 429 states and 1385 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:30,826 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-07-09 17:36:31,126 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-07-09 17:36:31,349 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-07-09 17:36:31,701 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 130 [2021-07-09 17:36:31,990 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-07-09 17:36:32,219 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-07-09 17:36:32,621 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 139 [2021-07-09 17:36:32,918 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2021-07-09 17:36:33,248 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2021-07-09 17:36:33,462 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-09 17:36:33,798 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2021-07-09 17:36:34,062 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2021-07-09 17:36:34,346 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-07-09 17:36:34,532 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 17:36:34,818 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2021-07-09 17:36:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:34,862 INFO L93 Difference]: Finished difference Result 651 states and 1990 transitions. [2021-07-09 17:36:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:34,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:34,863 INFO L225 Difference]: With dead ends: 651 [2021-07-09 17:36:34,863 INFO L226 Difference]: Without dead ends: 622 [2021-07-09 17:36:34,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4461.1ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:36:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-07-09 17:36:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 426. [2021-07-09 17:36:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2305882352941175) internal successors, (1373), 425 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1373 transitions. [2021-07-09 17:36:34,869 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1373 transitions. Word has length 18 [2021-07-09 17:36:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:34,869 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1373 transitions. [2021-07-09 17:36:34,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1373 transitions. [2021-07-09 17:36:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:34,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:34,870 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:35,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7284 [2021-07-09 17:36:35,082 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:35,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1951677924, now seen corresponding path program 274 times [2021-07-09 17:36:35,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:35,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961290485] [2021-07-09 17:36:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:35,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961290485] [2021-07-09 17:36:35,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961290485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428545524] [2021-07-09 17:36:35,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:35,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:35,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:35,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:35,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:35,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,422 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:36:35,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:35,423 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-07-09 17:36:35,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:35,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:35,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:35,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:35,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:35,599 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:35,602 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:35,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,659 INFO L628 ElimStorePlain]: treesize reduction 81, result has 49.1 percent of original size [2021-07-09 17:36:35,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:35,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:35,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:35,665 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:35,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:35,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:35,692 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:200, output treesize:56 [2021-07-09 17:36:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428545524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:35,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:35,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134405843] [2021-07-09 17:36:35,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:35,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:35,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:35,755 INFO L87 Difference]: Start difference. First operand 426 states and 1373 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,228 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-09 17:36:36,372 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-09 17:36:36,561 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-07-09 17:36:36,712 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-09 17:36:36,865 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-09 17:36:37,074 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-09 17:36:37,239 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-07-09 17:36:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:37,424 INFO L93 Difference]: Finished difference Result 624 states and 1899 transitions. [2021-07-09 17:36:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:36:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:37,426 INFO L225 Difference]: With dead ends: 624 [2021-07-09 17:36:37,426 INFO L226 Difference]: Without dead ends: 610 [2021-07-09 17:36:37,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1594.1ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:36:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-09 17:36:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 429. [2021-07-09 17:36:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.25) internal successors, (1391), 428 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-07-09 17:36:37,432 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-07-09 17:36:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:37,432 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-07-09 17:36:37,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-07-09 17:36:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:37,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:37,432 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:37,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7314,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,633 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1063225658, now seen corresponding path program 275 times [2021-07-09 17:36:37,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:37,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70116356] [2021-07-09 17:36:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:37,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70116356] [2021-07-09 17:36:37,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70116356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549604601] [2021-07-09 17:36:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:37,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:37,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:37,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:37,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:37,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:37,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:37,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:37,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:37,951 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:36:37,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:37,952 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:36:38,189 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1859, array_4], 1=[array_0, v_prenex_1858]} [2021-07-09 17:36:38,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:38,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:38,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,226 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:36:38,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:38,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:38,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:38,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:38,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:38,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:38,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1858 vanished before elimination [2021-07-09 17:36:38,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:38,268 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:36:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:38,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549604601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:38,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:38,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:36:38,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40747950] [2021-07-09 17:36:38,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:38,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:38,288 INFO L87 Difference]: Start difference. First operand 429 states and 1391 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:38,991 INFO L93 Difference]: Finished difference Result 593 states and 1821 transitions. [2021-07-09 17:36:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:38,993 INFO L225 Difference]: With dead ends: 593 [2021-07-09 17:36:38,993 INFO L226 Difference]: Without dead ends: 588 [2021-07-09 17:36:38,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 762.4ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-09 17:36:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 434. [2021-07-09 17:36:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.258660508083141) internal successors, (1411), 433 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1411 transitions. [2021-07-09 17:36:38,999 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1411 transitions. Word has length 18 [2021-07-09 17:36:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:38,999 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1411 transitions. [2021-07-09 17:36:38,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1411 transitions. [2021-07-09 17:36:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:38,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:38,999 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:39,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7325,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,200 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:39,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1919721604, now seen corresponding path program 276 times [2021-07-09 17:36:39,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:39,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53381469] [2021-07-09 17:36:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:39,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53381469] [2021-07-09 17:36:39,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53381469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553250414] [2021-07-09 17:36:39,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:36:39,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:39,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:39,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:39,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:39,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:39,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:39,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:39,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,503 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:36:39,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:39,504 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:36:39,761 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1864], 1=[array_0, v_prenex_1863]} [2021-07-09 17:36:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:39,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:39,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:39,809 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:36:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:36:39,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:39,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:39,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:39,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:39,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:39,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:39,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:39,851 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1863 vanished before elimination [2021-07-09 17:36:39,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:39,852 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:36:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553250414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:39,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:36:39,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979805924] [2021-07-09 17:36:39,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:39,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:39,874 INFO L87 Difference]: Start difference. First operand 434 states and 1411 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:40,640 INFO L93 Difference]: Finished difference Result 589 states and 1822 transitions. [2021-07-09 17:36:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:40,641 INFO L225 Difference]: With dead ends: 589 [2021-07-09 17:36:40,642 INFO L226 Difference]: Without dead ends: 584 [2021-07-09 17:36:40,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 779.6ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-09 17:36:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2021-07-09 17:36:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.2637614678899083) internal successors, (1423), 436 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1423 transitions. [2021-07-09 17:36:40,647 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1423 transitions. Word has length 18 [2021-07-09 17:36:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:40,647 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1423 transitions. [2021-07-09 17:36:40,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1423 transitions. [2021-07-09 17:36:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:40,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:40,648 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:40,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7342 [2021-07-09 17:36:40,849 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash -20267142, now seen corresponding path program 277 times [2021-07-09 17:36:40,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:40,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940495029] [2021-07-09 17:36:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:40,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:40,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940495029] [2021-07-09 17:36:40,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940495029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:40,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037802955] [2021-07-09 17:36:40,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:41,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:41,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:41,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:41,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:41,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:41,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:41,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,162 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:36:41,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:41,163 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:36:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:41,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:41,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,438 INFO L628 ElimStorePlain]: treesize reduction 90, result has 40.4 percent of original size [2021-07-09 17:36:41,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:41,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:41,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1869 vanished before elimination [2021-07-09 17:36:41,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:41,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:41,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:41,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:41,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:41,497 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-07-09 17:36:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037802955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:41,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:36:41,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147799012] [2021-07-09 17:36:41,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:41,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:41,558 INFO L87 Difference]: Start difference. First operand 437 states and 1423 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:42,330 INFO L93 Difference]: Finished difference Result 606 states and 1865 transitions. [2021-07-09 17:36:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:42,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:42,332 INFO L225 Difference]: With dead ends: 606 [2021-07-09 17:36:42,332 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 17:36:42,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 17:36:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-07-09 17:36:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.25) internal successors, (1391), 428 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-07-09 17:36:42,338 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-07-09 17:36:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:42,338 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-07-09 17:36:42,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-07-09 17:36:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:42,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:42,338 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:42,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7360,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,539 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1764290236, now seen corresponding path program 278 times [2021-07-09 17:36:42,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:42,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070424737] [2021-07-09 17:36:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:42,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070424737] [2021-07-09 17:36:42,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070424737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308976073] [2021-07-09 17:36:42,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:42,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:42,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:42,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:42,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:42,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:42,828 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-07-09 17:36:42,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:42,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-07-09 17:36:43,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:43,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:43,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:43,038 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:36:43,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:43,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:43,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:43,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:43,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:43,048 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:36:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308976073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:43,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:36:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655791782] [2021-07-09 17:36:43,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:36:43,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:36:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:36:43,070 INFO L87 Difference]: Start difference. First operand 429 states and 1391 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:43,711 INFO L93 Difference]: Finished difference Result 616 states and 1895 transitions. [2021-07-09 17:36:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:43,712 INFO L225 Difference]: With dead ends: 616 [2021-07-09 17:36:43,712 INFO L226 Difference]: Without dead ends: 610 [2021-07-09 17:36:43,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 628.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:36:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-09 17:36:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 433. [2021-07-09 17:36:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2569444444444446) internal successors, (1407), 432 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1407 transitions. [2021-07-09 17:36:43,718 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1407 transitions. Word has length 18 [2021-07-09 17:36:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:43,718 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1407 transitions. [2021-07-09 17:36:43,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1407 transitions. [2021-07-09 17:36:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:43,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:43,719 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:43,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7378 [2021-07-09 17:36:43,919 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1082938280, now seen corresponding path program 279 times [2021-07-09 17:36:43,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:43,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583746666] [2021-07-09 17:36:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:44,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583746666] [2021-07-09 17:36:44,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583746666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521723856] [2021-07-09 17:36:44,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:44,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:44,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:44,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:44,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:44,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:44,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,247 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.7 percent of original size [2021-07-09 17:36:44,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:44,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:167, output treesize:117 [2021-07-09 17:36:44,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:44,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:44,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,487 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-07-09 17:36:44,487 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:36:44,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:44,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:44,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:44,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:44,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:44,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:44,534 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:36:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521723856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:44,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:44,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598063675] [2021-07-09 17:36:44,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:44,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:44,557 INFO L87 Difference]: Start difference. First operand 433 states and 1407 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:45,551 INFO L93 Difference]: Finished difference Result 613 states and 1901 transitions. [2021-07-09 17:36:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:36:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:45,553 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:36:45,553 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 17:36:45,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 897.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 17:36:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-07-09 17:36:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.25) internal successors, (1391), 428 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-07-09 17:36:45,559 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-07-09 17:36:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:45,559 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-07-09 17:36:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-07-09 17:36:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:45,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:45,559 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:45,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7391,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:45,760 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash -446381756, now seen corresponding path program 280 times [2021-07-09 17:36:45,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:45,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188328672] [2021-07-09 17:36:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188328672] [2021-07-09 17:36:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188328672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950709906] [2021-07-09 17:36:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:45,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:45,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:45,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:45,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:45,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:45,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:45,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:45,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:45,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:45,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:45,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,056 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:36:46,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:46,057 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:36:46,325 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1879, array_4], 1=[v_prenex_1878, array_0]} [2021-07-09 17:36:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:46,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:46,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,362 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:36:46,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:46,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:46,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1878 vanished before elimination [2021-07-09 17:36:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:46,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:46,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:46,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:46,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:46,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:46,410 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:36:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950709906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:46,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:36:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091596867] [2021-07-09 17:36:46,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:46,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:46,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:46,431 INFO L87 Difference]: Start difference. First operand 429 states and 1391 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,788 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-09 17:36:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:46,966 INFO L93 Difference]: Finished difference Result 558 states and 1726 transitions. [2021-07-09 17:36:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:46,968 INFO L225 Difference]: With dead ends: 558 [2021-07-09 17:36:46,968 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 17:36:46,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 17:36:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 431. [2021-07-09 17:36:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.244186046511628) internal successors, (1395), 430 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1395 transitions. [2021-07-09 17:36:46,973 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1395 transitions. Word has length 18 [2021-07-09 17:36:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:46,973 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1395 transitions. [2021-07-09 17:36:46,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1395 transitions. [2021-07-09 17:36:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:46,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:46,974 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:47,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7403,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:47,175 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:47,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2024323972, now seen corresponding path program 281 times [2021-07-09 17:36:47,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:47,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618562633] [2021-07-09 17:36:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:47,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618562633] [2021-07-09 17:36:47,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618562633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455254722] [2021-07-09 17:36:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:47,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:47,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:47,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:47,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:47,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:47,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,530 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:36:47,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:47,531 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-07-09 17:36:47,727 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-07-09 17:36:47,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:47,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:47,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:47,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:47,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:47,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,809 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:36:47,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:36:47,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:47,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:47,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:47,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:47,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:47,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:47,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:47,862 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-07-09 17:36:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455254722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:47,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:36:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286548190] [2021-07-09 17:36:47,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:47,938 INFO L87 Difference]: Start difference. First operand 431 states and 1395 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,482 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-07-09 17:36:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:48,973 INFO L93 Difference]: Finished difference Result 561 states and 1758 transitions. [2021-07-09 17:36:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:48,974 INFO L225 Difference]: With dead ends: 561 [2021-07-09 17:36:48,974 INFO L226 Difference]: Without dead ends: 556 [2021-07-09 17:36:48,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-09 17:36:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 432. [2021-07-09 17:36:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.2412993039443156) internal successors, (1397), 431 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1397 transitions. [2021-07-09 17:36:48,980 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1397 transitions. Word has length 18 [2021-07-09 17:36:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:48,980 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1397 transitions. [2021-07-09 17:36:48,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1397 transitions. [2021-07-09 17:36:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:48,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:48,981 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:49,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7420 [2021-07-09 17:36:49,181 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1950951492, now seen corresponding path program 282 times [2021-07-09 17:36:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:49,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005738822] [2021-07-09 17:36:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005738822] [2021-07-09 17:36:49,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005738822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297476910] [2021-07-09 17:36:49,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:49,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:49,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:49,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:49,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:49,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:49,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:49,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:49,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:49,483 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:49,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,548 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:36:49,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:49,549 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:36:49,702 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1887], 1=[array_0, v_prenex_1886]} [2021-07-09 17:36:49,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:49,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:49,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:49,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:49,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,763 INFO L628 ElimStorePlain]: treesize reduction 88, result has 42.1 percent of original size [2021-07-09 17:36:49,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:49,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:49,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,788 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:36:49,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:49,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:49,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:49,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:49,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:49,827 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:180, output treesize:53 [2021-07-09 17:36:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:49,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297476910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:49,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:49,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:36:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930003319] [2021-07-09 17:36:49,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:49,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:49,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:49,895 INFO L87 Difference]: Start difference. First operand 432 states and 1397 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,262 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-09 17:36:50,442 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-07-09 17:36:50,653 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-07-09 17:36:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:50,716 INFO L93 Difference]: Finished difference Result 537 states and 1687 transitions. [2021-07-09 17:36:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:36:50,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:50,717 INFO L225 Difference]: With dead ends: 537 [2021-07-09 17:36:50,717 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:36:50,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:36:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:36:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 430. [2021-07-09 17:36:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.247086247086247) internal successors, (1393), 429 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1393 transitions. [2021-07-09 17:36:50,723 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1393 transitions. Word has length 18 [2021-07-09 17:36:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:50,723 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1393 transitions. [2021-07-09 17:36:50,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1393 transitions. [2021-07-09 17:36:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:50,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:50,723 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:50,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7433 [2021-07-09 17:36:50,924 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1782463162, now seen corresponding path program 283 times [2021-07-09 17:36:50,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:50,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270326220] [2021-07-09 17:36:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270326220] [2021-07-09 17:36:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270326220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782844301] [2021-07-09 17:36:51,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:51,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:36:51,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:36:51,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:36:51,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:51,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:51,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:51,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,324 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:36:51,324 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-07-09 17:36:51,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:51,326 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-07-09 17:36:51,648 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 17:36:51,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:51,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:51,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:51,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:51,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:51,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:51,825 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:51,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:51,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:51,837 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:51,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:51,848 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:51,854 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:51,859 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:51,865 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:51,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:51,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:52,020 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-07-09 17:36:52,021 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:36:52,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:52,026 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:52,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:52,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:36:52,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:52,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:52,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:36:52,087 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:36:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:52,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782844301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:52,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:52,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:52,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299753647] [2021-07-09 17:36:52,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:52,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:52,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:52,171 INFO L87 Difference]: Start difference. First operand 430 states and 1393 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,712 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-09 17:36:53,162 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-09 17:36:53,526 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 111 [2021-07-09 17:36:53,745 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 17:36:54,005 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-07-09 17:36:54,233 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-07-09 17:36:54,508 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-07-09 17:36:54,674 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-09 17:36:54,880 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-09 17:36:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:54,950 INFO L93 Difference]: Finished difference Result 659 states and 2036 transitions. [2021-07-09 17:36:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:36:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:54,951 INFO L225 Difference]: With dead ends: 659 [2021-07-09 17:36:54,951 INFO L226 Difference]: Without dead ends: 639 [2021-07-09 17:36:54,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2785.7ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-07-09 17:36:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 425. [2021-07-09 17:36:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.2382075471698113) internal successors, (1373), 424 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1373 transitions. [2021-07-09 17:36:54,957 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1373 transitions. Word has length 18 [2021-07-09 17:36:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:54,957 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1373 transitions. [2021-07-09 17:36:54,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1373 transitions. [2021-07-09 17:36:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:54,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:54,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:55,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7451 [2021-07-09 17:36:55,158 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash 350513638, now seen corresponding path program 284 times [2021-07-09 17:36:55,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:55,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695066038] [2021-07-09 17:36:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:55,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695066038] [2021-07-09 17:36:55,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695066038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900206879] [2021-07-09 17:36:55,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:55,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:55,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:55,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:55,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:55,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:55,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:55,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,484 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-07-09 17:36:55,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:55,485 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-07-09 17:36:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:36:55,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:55,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:55,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:55,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:55,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:55,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:55,627 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-07-09 17:36:55,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:55,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:55,630 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:55,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:55,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:55,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:55,663 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-07-09 17:36:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900206879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:55,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:36:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415060852] [2021-07-09 17:36:55,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:55,772 INFO L87 Difference]: Start difference. First operand 425 states and 1373 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,410 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-07-09 17:36:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:56,626 INFO L93 Difference]: Finished difference Result 572 states and 1761 transitions. [2021-07-09 17:36:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:56,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:56,628 INFO L225 Difference]: With dead ends: 572 [2021-07-09 17:36:56,628 INFO L226 Difference]: Without dead ends: 561 [2021-07-09 17:36:56,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 878.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-07-09 17:36:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 426. [2021-07-09 17:36:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2470588235294118) internal successors, (1380), 425 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1380 transitions. [2021-07-09 17:36:56,633 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1380 transitions. Word has length 18 [2021-07-09 17:36:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:56,633 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1380 transitions. [2021-07-09 17:36:56,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1380 transitions. [2021-07-09 17:36:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:56,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:56,634 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:56,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7481,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:56,834 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1415193868, now seen corresponding path program 285 times [2021-07-09 17:36:56,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:56,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232417169] [2021-07-09 17:36:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:57,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:57,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232417169] [2021-07-09 17:36:57,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232417169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143774635] [2021-07-09 17:36:57,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:57,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:36:57,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:36:57,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:57,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:57,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:57,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:57,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,301 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:36:57,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:57,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-07-09 17:36:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:57,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:36:57,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:36:57,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:57,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:57,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:57,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:57,444 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,536 INFO L628 ElimStorePlain]: treesize reduction 83, result has 49.4 percent of original size [2021-07-09 17:36:57,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:36:57,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:57,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:36:57,543 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:57,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:57,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:57,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:36:57,573 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:250, output treesize:59 [2021-07-09 17:36:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:57,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143774635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:57,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:36:57,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101461028] [2021-07-09 17:36:57,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:36:57,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:36:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:36:57,684 INFO L87 Difference]: Start difference. First operand 426 states and 1380 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:58,169 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-07-09 17:36:58,380 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-09 17:36:58,587 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-07-09 17:36:58,793 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-07-09 17:36:59,038 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-07-09 17:36:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:59,140 INFO L93 Difference]: Finished difference Result 550 states and 1707 transitions. [2021-07-09 17:36:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:36:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:59,141 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:36:59,141 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:36:59,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1565.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:36:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:36:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 428. [2021-07-09 17:36:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.243559718969555) internal successors, (1385), 427 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1385 transitions. [2021-07-09 17:36:59,146 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1385 transitions. Word has length 18 [2021-07-09 17:36:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:59,146 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1385 transitions. [2021-07-09 17:36:59,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1385 transitions. [2021-07-09 17:36:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:36:59,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:59,147 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:59,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7494,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:59,347 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1953749984, now seen corresponding path program 286 times [2021-07-09 17:36:59,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:59,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936077385] [2021-07-09 17:36:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:59,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:59,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936077385] [2021-07-09 17:36:59,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936077385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:59,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496317574] [2021-07-09 17:36:59,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:59,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:59,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:36:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:59,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:59,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:36:59,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:36:59,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:36:59,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:59,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:59,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:36:59,640 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,746 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:36:59,746 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-07-09 17:36:59,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:36:59,747 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-07-09 17:36:59,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:59,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:59,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:36:59,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:59,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:36:59,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:36:59,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:59,953 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:36:59,958 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:36:59,962 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:36:59,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:59,971 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:36:59,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-07-09 17:36:59,975 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:59,978 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:59,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:36:59,981 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:00,058 INFO L628 ElimStorePlain]: treesize reduction 214, result has 27.2 percent of original size [2021-07-09 17:37:00,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:37:00,062 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:00,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:00,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:37:00,064 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:00,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:00,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:00,090 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:611, output treesize:70 [2021-07-09 17:37:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:00,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496317574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:00,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:00,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:00,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370049420] [2021-07-09 17:37:00,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:00,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:00,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:00,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:00,201 INFO L87 Difference]: Start difference. First operand 428 states and 1385 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,674 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-09 17:37:01,158 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 17:37:01,570 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-07-09 17:37:01,855 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-07-09 17:37:02,054 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-07-09 17:37:02,209 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-07-09 17:37:02,391 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-09 17:37:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:02,465 INFO L93 Difference]: Finished difference Result 679 states and 2103 transitions. [2021-07-09 17:37:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:02,466 INFO L225 Difference]: With dead ends: 679 [2021-07-09 17:37:02,466 INFO L226 Difference]: Without dead ends: 665 [2021-07-09 17:37:02,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2114.1ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:37:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-09 17:37:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 426. [2021-07-09 17:37:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2470588235294118) internal successors, (1380), 425 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1380 transitions. [2021-07-09 17:37:02,472 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1380 transitions. Word has length 18 [2021-07-09 17:37:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:02,472 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1380 transitions. [2021-07-09 17:37:02,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1380 transitions. [2021-07-09 17:37:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:02,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:02,473 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:02,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7505 [2021-07-09 17:37:02,673 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1498526464, now seen corresponding path program 287 times [2021-07-09 17:37:02,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:02,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223635412] [2021-07-09 17:37:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:02,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:02,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223635412] [2021-07-09 17:37:02,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223635412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:02,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055192417] [2021-07-09 17:37:02,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:02,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:02,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:02,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:02,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:02,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:02,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:02,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:02,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:02,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:02,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,053 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:37:03,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:03,054 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:03,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:03,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:03,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:03,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:03,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:03,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:03,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:03,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:03,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,255 INFO L628 ElimStorePlain]: treesize reduction 174, result has 32.3 percent of original size [2021-07-09 17:37:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:03,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:03,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:03,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:03,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:03,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:03,292 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-07-09 17:37:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055192417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:03,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:03,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:03,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606197031] [2021-07-09 17:37:03,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:03,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:03,403 INFO L87 Difference]: Start difference. First operand 426 states and 1380 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,899 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 17:37:04,073 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-07-09 17:37:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:04,132 INFO L93 Difference]: Finished difference Result 536 states and 1675 transitions. [2021-07-09 17:37:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:04,133 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:37:04,133 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:37:04,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:37:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 426. [2021-07-09 17:37:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.244705882352941) internal successors, (1379), 425 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1379 transitions. [2021-07-09 17:37:04,138 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1379 transitions. Word has length 18 [2021-07-09 17:37:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:04,138 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1379 transitions. [2021-07-09 17:37:04,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1379 transitions. [2021-07-09 17:37:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:04,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:04,139 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:04,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7528,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:04,339 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1558536974, now seen corresponding path program 288 times [2021-07-09 17:37:04,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:04,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022866835] [2021-07-09 17:37:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:04,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:04,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022866835] [2021-07-09 17:37:04,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022866835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696406014] [2021-07-09 17:37:04,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:04,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:04,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:04,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:04,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:04,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:04,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:04,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:04,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:04,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,687 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:37:04,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:04,688 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:04,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:04,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:04,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:04,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:04,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:04,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:04,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:04,887 INFO L628 ElimStorePlain]: treesize reduction 174, result has 32.3 percent of original size [2021-07-09 17:37:04,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:04,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:04,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:04,898 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:04,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:04,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:04,929 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-07-09 17:37:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696406014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:05,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:05,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414182649] [2021-07-09 17:37:05,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:05,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:05,036 INFO L87 Difference]: Start difference. First operand 426 states and 1379 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,509 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 17:37:05,713 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-09 17:37:05,910 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 17:37:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,116 INFO L93 Difference]: Finished difference Result 552 states and 1723 transitions. [2021-07-09 17:37:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,117 INFO L225 Difference]: With dead ends: 552 [2021-07-09 17:37:06,117 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:37:06,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1089.4ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:37:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 423. [2021-07-09 17:37:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.2369668246445498) internal successors, (1366), 422 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1366 transitions. [2021-07-09 17:37:06,123 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1366 transitions. Word has length 18 [2021-07-09 17:37:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,123 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1366 transitions. [2021-07-09 17:37:06,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1366 transitions. [2021-07-09 17:37:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:06,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,124 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7541 [2021-07-09 17:37:06,324 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1921396440, now seen corresponding path program 289 times [2021-07-09 17:37:06,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872023633] [2021-07-09 17:37:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872023633] [2021-07-09 17:37:06,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872023633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527442998] [2021-07-09 17:37:06,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:06,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:06,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:06,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:06,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:06,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:06,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,713 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:37:06,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:06,715 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:193, output treesize:81 [2021-07-09 17:37:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:06,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:06,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,844 INFO L628 ElimStorePlain]: treesize reduction 71, result has 50.0 percent of original size [2021-07-09 17:37:06,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:06,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:06,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:06,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:06,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:06,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:06,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:06,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:06,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1899 vanished before elimination [2021-07-09 17:37:06,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1898 vanished before elimination [2021-07-09 17:37:06,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:06,939 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:53 [2021-07-09 17:37:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527442998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:07,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:07,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130059349] [2021-07-09 17:37:07,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:07,005 INFO L87 Difference]: Start difference. First operand 423 states and 1366 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,617 INFO L93 Difference]: Finished difference Result 539 states and 1643 transitions. [2021-07-09 17:37:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,619 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:37:07,619 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:37:07,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 594.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:37:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 419. [2021-07-09 17:37:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.2440191387559807) internal successors, (1356), 418 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1356 transitions. [2021-07-09 17:37:07,624 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1356 transitions. Word has length 18 [2021-07-09 17:37:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,624 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1356 transitions. [2021-07-09 17:37:07,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1356 transitions. [2021-07-09 17:37:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:07,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,625 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7552 [2021-07-09 17:37:07,826 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1307733628, now seen corresponding path program 290 times [2021-07-09 17:37:07,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125176001] [2021-07-09 17:37:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125176001] [2021-07-09 17:37:07,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125176001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944831220] [2021-07-09 17:37:07,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:07,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:08,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:08,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:08,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:08,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,113 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.1 percent of original size [2021-07-09 17:37:08,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:08,114 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:64 [2021-07-09 17:37:08,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:08,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:08,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:08,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,255 INFO L628 ElimStorePlain]: treesize reduction 78, result has 24.3 percent of original size [2021-07-09 17:37:08,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:08,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:08,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:08,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:08,264 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:37:08,264 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:37:08,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:08,265 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:99, output treesize:11 [2021-07-09 17:37:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944831220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:08,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:08,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771810988] [2021-07-09 17:37:08,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:08,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:08,285 INFO L87 Difference]: Start difference. First operand 419 states and 1356 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:08,750 INFO L93 Difference]: Finished difference Result 503 states and 1588 transitions. [2021-07-09 17:37:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:08,751 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:37:08,751 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:37:08,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:37:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 415. [2021-07-09 17:37:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.248792270531401) internal successors, (1345), 414 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1345 transitions. [2021-07-09 17:37:08,756 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1345 transitions. Word has length 18 [2021-07-09 17:37:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:08,756 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1345 transitions. [2021-07-09 17:37:08,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1345 transitions. [2021-07-09 17:37:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:08,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:08,757 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:08,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7564 [2021-07-09 17:37:08,957 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash 173504242, now seen corresponding path program 291 times [2021-07-09 17:37:08,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:08,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153555150] [2021-07-09 17:37:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:09,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153555150] [2021-07-09 17:37:09,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153555150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16613026] [2021-07-09 17:37:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:09,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:09,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:09,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:09,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-09 17:37:09,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:37:09,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:09,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:09,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:85, output treesize:69 [2021-07-09 17:37:09,250 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-07-09 17:37:09,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:09,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:09,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:09,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:09,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:09,313 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.5 percent of original size [2021-07-09 17:37:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:09,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:09,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:09,320 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:09,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:09,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:09,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:09,349 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:149, output treesize:38 [2021-07-09 17:37:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16613026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:09,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818926616] [2021-07-09 17:37:09,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:09,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:09,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:09,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:09,405 INFO L87 Difference]: Start difference. First operand 415 states and 1345 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:09,902 INFO L93 Difference]: Finished difference Result 483 states and 1534 transitions. [2021-07-09 17:37:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:09,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:09,903 INFO L225 Difference]: With dead ends: 483 [2021-07-09 17:37:09,903 INFO L226 Difference]: Without dead ends: 470 [2021-07-09 17:37:09,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-09 17:37:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 402. [2021-07-09 17:37:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.2418952618453867) internal successors, (1300), 401 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1300 transitions. [2021-07-09 17:37:09,908 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1300 transitions. Word has length 18 [2021-07-09 17:37:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:09,908 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1300 transitions. [2021-07-09 17:37:09,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1300 transitions. [2021-07-09 17:37:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:09,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:09,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:10,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7575 [2021-07-09 17:37:10,109 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash 874568820, now seen corresponding path program 292 times [2021-07-09 17:37:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:10,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403204732] [2021-07-09 17:37:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:10,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403204732] [2021-07-09 17:37:10,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403204732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452958782] [2021-07-09 17:37:10,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:10,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:10,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:10,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:10,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:10,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,513 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-07-09 17:37:10,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:10,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-07-09 17:37:10,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:10,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:10,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:10,714 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.2 percent of original size [2021-07-09 17:37:10,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:10,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:10,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,742 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1904 vanished before elimination [2021-07-09 17:37:10,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:10,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:10,748 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:10,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:10,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:10,776 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:183, output treesize:56 [2021-07-09 17:37:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452958782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:10,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:10,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111312304] [2021-07-09 17:37:10,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:10,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:10,841 INFO L87 Difference]: Start difference. First operand 402 states and 1300 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,378 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-07-09 17:37:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:11,612 INFO L93 Difference]: Finished difference Result 462 states and 1465 transitions. [2021-07-09 17:37:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:11,613 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:37:11,613 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:37:11,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 877.4ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:37:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 402. [2021-07-09 17:37:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.2418952618453867) internal successors, (1300), 401 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1300 transitions. [2021-07-09 17:37:11,618 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1300 transitions. Word has length 18 [2021-07-09 17:37:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:11,618 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1300 transitions. [2021-07-09 17:37:11,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1300 transitions. [2021-07-09 17:37:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:11,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:11,618 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:11,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7584,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:11,819 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:11,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2069604994, now seen corresponding path program 293 times [2021-07-09 17:37:11,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:11,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807522699] [2021-07-09 17:37:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807522699] [2021-07-09 17:37:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807522699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476489355] [2021-07-09 17:37:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:12,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:12,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:12,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:12,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:12,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:12,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:12,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:12,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:12,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:131 [2021-07-09 17:37:12,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:12,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:12,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:12,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:12,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:12,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:12,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:12,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:12,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:12,237 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:12,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,324 INFO L628 ElimStorePlain]: treesize reduction 108, result has 44.6 percent of original size [2021-07-09 17:37:12,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:37:12,328 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:12,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:12,331 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:12,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:12,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:12,365 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:367, output treesize:71 [2021-07-09 17:37:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:12,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476489355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:12,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:12,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149144458] [2021-07-09 17:37:12,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:12,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:12,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:12,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:12,475 INFO L87 Difference]: Start difference. First operand 402 states and 1300 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:12,944 INFO L93 Difference]: Finished difference Result 470 states and 1488 transitions. [2021-07-09 17:37:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:12,945 INFO L225 Difference]: With dead ends: 470 [2021-07-09 17:37:12,945 INFO L226 Difference]: Without dead ends: 460 [2021-07-09 17:37:12,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-07-09 17:37:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 405. [2021-07-09 17:37:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.245049504950495) internal successors, (1311), 404 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-07-09 17:37:12,950 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-07-09 17:37:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:12,950 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-07-09 17:37:12,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-07-09 17:37:12,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:12,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:12,951 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:13,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7595 [2021-07-09 17:37:13,151 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:13,151 INFO L82 PathProgramCache]: Analyzing trace with hash 129616248, now seen corresponding path program 294 times [2021-07-09 17:37:13,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:13,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779560010] [2021-07-09 17:37:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:13,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779560010] [2021-07-09 17:37:13,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779560010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635024117] [2021-07-09 17:37:13,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:13,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:13,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:13,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:13,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:13,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:13,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:13,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:13,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:13,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:13,600 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-09 17:37:13,601 INFO L628 ElimStorePlain]: treesize reduction 68, result has 76.0 percent of original size [2021-07-09 17:37:13,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:13,602 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:247, output treesize:215 [2021-07-09 17:37:14,060 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-07-09 17:37:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:14,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:14,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:14,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:14,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:14,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:14,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:14,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:14,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:14,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:14,255 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:14,261 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:14,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:14,267 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:14,272 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:14,277 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,428 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-07-09 17:37:14,429 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:37:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:14,433 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:14,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:14,437 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:14,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:14,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:37:14,492 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:37:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635024117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:14,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:14,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210633016] [2021-07-09 17:37:14,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:14,577 INFO L87 Difference]: Start difference. First operand 405 states and 1311 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,021 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-09 17:37:15,316 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-07-09 17:37:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,623 INFO L93 Difference]: Finished difference Result 488 states and 1537 transitions. [2021-07-09 17:37:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,624 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:37:15,624 INFO L226 Difference]: Without dead ends: 474 [2021-07-09 17:37:15,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1374.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-09 17:37:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 400. [2021-07-09 17:37:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.245614035087719) internal successors, (1295), 399 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1295 transitions. [2021-07-09 17:37:15,629 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1295 transitions. Word has length 18 [2021-07-09 17:37:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,629 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1295 transitions. [2021-07-09 17:37:15,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1295 transitions. [2021-07-09 17:37:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:15,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,630 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:15,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7612,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:15,830 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:15,831 INFO L82 PathProgramCache]: Analyzing trace with hash 722420652, now seen corresponding path program 295 times [2021-07-09 17:37:15,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:15,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421051106] [2021-07-09 17:37:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:15,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:15,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421051106] [2021-07-09 17:37:15,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421051106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741381344] [2021-07-09 17:37:15,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:16,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:16,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:16,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:16,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:16,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:16,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:16,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,195 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-07-09 17:37:16,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:16,196 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-07-09 17:37:16,433 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1919], 1=[array_0, v_prenex_1918]} [2021-07-09 17:37:16,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:16,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:16,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:16,480 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:37:16,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:16,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:16,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:16,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:16,504 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:16,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:16,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1918 vanished before elimination [2021-07-09 17:37:16,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:16,524 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:37:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741381344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:16,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:16,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811251100] [2021-07-09 17:37:16,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:16,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:16,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:16,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:16,545 INFO L87 Difference]: Start difference. First operand 400 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:17,120 INFO L93 Difference]: Finished difference Result 462 states and 1463 transitions. [2021-07-09 17:37:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:17,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:17,121 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:37:17,121 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:37:17,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:37:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 403. [2021-07-09 17:37:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.2512437810945274) internal successors, (1307), 402 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1307 transitions. [2021-07-09 17:37:17,126 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1307 transitions. Word has length 18 [2021-07-09 17:37:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:17,126 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1307 transitions. [2021-07-09 17:37:17,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1307 transitions. [2021-07-09 17:37:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:17,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:17,127 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:17,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7642 [2021-07-09 17:37:17,327 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568094, now seen corresponding path program 296 times [2021-07-09 17:37:17,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:17,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611498888] [2021-07-09 17:37:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:17,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:17,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611498888] [2021-07-09 17:37:17,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611498888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:17,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740921339] [2021-07-09 17:37:17,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:17,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:17,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:17,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:17,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:17,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:17,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,623 INFO L628 ElimStorePlain]: treesize reduction 28, result has 69.2 percent of original size [2021-07-09 17:37:17,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:17,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-07-09 17:37:17,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:17,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:17,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:17,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:17,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:17,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,875 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-07-09 17:37:17,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:37:17,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:17,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:17,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:17,887 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:17,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:17,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:17,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:17,925 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-07-09 17:37:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740921339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:18,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:18,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023857307] [2021-07-09 17:37:18,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:18,001 INFO L87 Difference]: Start difference. First operand 403 states and 1307 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:18,591 INFO L93 Difference]: Finished difference Result 476 states and 1507 transitions. [2021-07-09 17:37:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:37:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:18,592 INFO L225 Difference]: With dead ends: 476 [2021-07-09 17:37:18,592 INFO L226 Difference]: Without dead ends: 471 [2021-07-09 17:37:18,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-09 17:37:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 401. [2021-07-09 17:37:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.2425) internal successors, (1297), 400 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1297 transitions. [2021-07-09 17:37:18,597 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1297 transitions. Word has length 18 [2021-07-09 17:37:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:18,597 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1297 transitions. [2021-07-09 17:37:18,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1297 transitions. [2021-07-09 17:37:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:18,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:18,597 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:18,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7660,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:18,798 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -92385502, now seen corresponding path program 297 times [2021-07-09 17:37:18,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:18,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614980859] [2021-07-09 17:37:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:18,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614980859] [2021-07-09 17:37:18,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614980859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064523115] [2021-07-09 17:37:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:19,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:19,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:19,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:19,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:19,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:19,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,147 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-07-09 17:37:19,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:19,148 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-07-09 17:37:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:19,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:19,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:19,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:19,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:19,225 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:19,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:19,293 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-07-09 17:37:19,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:19,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:19,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:19,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:19,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:19,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:19,331 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-07-09 17:37:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064523115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:19,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50379640] [2021-07-09 17:37:19,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:19,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:19,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:19,435 INFO L87 Difference]: Start difference. First operand 401 states and 1297 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:20,159 INFO L93 Difference]: Finished difference Result 488 states and 1525 transitions. [2021-07-09 17:37:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:20,160 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:37:20,161 INFO L226 Difference]: Without dead ends: 477 [2021-07-09 17:37:20,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-09 17:37:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 402. [2021-07-09 17:37:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.251870324189526) internal successors, (1304), 401 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1304 transitions. [2021-07-09 17:37:20,165 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1304 transitions. Word has length 18 [2021-07-09 17:37:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:20,166 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1304 transitions. [2021-07-09 17:37:20,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1304 transitions. [2021-07-09 17:37:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:20,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:20,166 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:20,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7675 [2021-07-09 17:37:20,369 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1651696552, now seen corresponding path program 298 times [2021-07-09 17:37:20,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:20,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137692047] [2021-07-09 17:37:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:20,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:20,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137692047] [2021-07-09 17:37:20,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137692047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:20,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172045479] [2021-07-09 17:37:20,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:20,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:20,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:20,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:20,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:20,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:20,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:20,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,817 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-07-09 17:37:20,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:20,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-07-09 17:37:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:20,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:20,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:20,971 INFO L628 ElimStorePlain]: treesize reduction 107, result has 50.2 percent of original size [2021-07-09 17:37:20,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:20,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,024 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.9 percent of original size [2021-07-09 17:37:21,025 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1924 vanished before elimination [2021-07-09 17:37:21,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:21,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:21,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:21,055 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1926 vanished before elimination [2021-07-09 17:37:21,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:21,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:21,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:21,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:21,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:21,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:21,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:21,095 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:229, output treesize:59 [2021-07-09 17:37:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172045479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:21,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942631162] [2021-07-09 17:37:21,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:21,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:21,205 INFO L87 Difference]: Start difference. First operand 402 states and 1304 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,948 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-09 17:37:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:22,121 INFO L93 Difference]: Finished difference Result 498 states and 1555 transitions. [2021-07-09 17:37:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:22,122 INFO L225 Difference]: With dead ends: 498 [2021-07-09 17:37:22,122 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 17:37:22,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 927.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:37:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 17:37:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 403. [2021-07-09 17:37:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.2512437810945274) internal successors, (1307), 402 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1307 transitions. [2021-07-09 17:37:22,127 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1307 transitions. Word has length 18 [2021-07-09 17:37:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:22,127 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1307 transitions. [2021-07-09 17:37:22,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1307 transitions. [2021-07-09 17:37:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:22,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:22,128 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:22,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7689,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,328 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1055627324, now seen corresponding path program 299 times [2021-07-09 17:37:22,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:22,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392838479] [2021-07-09 17:37:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392838479] [2021-07-09 17:37:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392838479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437727920] [2021-07-09 17:37:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:22,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:22,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:22,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:22,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:22,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:22,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,749 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-07-09 17:37:22,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:22,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-07-09 17:37:22,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:22,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:22,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:22,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:22,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:22,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:22,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:22,904 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-07-09 17:37:22,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:22,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:22,911 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:22,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:22,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:22,946 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-07-09 17:37:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:23,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437727920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:23,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:37:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20837563] [2021-07-09 17:37:23,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:37:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:37:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:23,059 INFO L87 Difference]: Start difference. First operand 403 states and 1307 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,991 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 17:37:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:24,093 INFO L93 Difference]: Finished difference Result 463 states and 1465 transitions. [2021-07-09 17:37:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:24,095 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:37:24,095 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:37:24,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1098.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:37:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 402. [2021-07-09 17:37:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.2493765586034913) internal successors, (1303), 401 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1303 transitions. [2021-07-09 17:37:24,100 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1303 transitions. Word has length 18 [2021-07-09 17:37:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:24,100 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1303 transitions. [2021-07-09 17:37:24,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1303 transitions. [2021-07-09 17:37:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:24,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:24,100 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:24,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7701,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,301 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash 306291208, now seen corresponding path program 300 times [2021-07-09 17:37:24,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:24,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323858893] [2021-07-09 17:37:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:24,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323858893] [2021-07-09 17:37:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323858893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013725205] [2021-07-09 17:37:24,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:24,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:24,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:24,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:24,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,792 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-07-09 17:37:24,793 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-07-09 17:37:24,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:24,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:199, output treesize:149 [2021-07-09 17:37:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:24,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:24,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:24,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:24,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:24,997 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-07-09 17:37:24,998 INFO L628 ElimStorePlain]: treesize reduction 137, result has 54.8 percent of original size [2021-07-09 17:37:25,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:25,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,094 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:37:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:25,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,171 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-07-09 17:37:25,172 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1928 vanished before elimination [2021-07-09 17:37:25,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:25,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:25,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:25,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:25,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:25,221 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1930 vanished before elimination [2021-07-09 17:37:25,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:25,222 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:299, output treesize:89 [2021-07-09 17:37:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013725205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:25,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892125123] [2021-07-09 17:37:25,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:25,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:25,367 INFO L87 Difference]: Start difference. First operand 402 states and 1303 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:25,763 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 17:37:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:26,087 INFO L93 Difference]: Finished difference Result 469 states and 1485 transitions. [2021-07-09 17:37:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:26,089 INFO L225 Difference]: With dead ends: 469 [2021-07-09 17:37:26,089 INFO L226 Difference]: Without dead ends: 463 [2021-07-09 17:37:26,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 884.9ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-09 17:37:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 399. [2021-07-09 17:37:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.241206030150754) internal successors, (1290), 398 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1290 transitions. [2021-07-09 17:37:26,093 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1290 transitions. Word has length 18 [2021-07-09 17:37:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:26,093 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1290 transitions. [2021-07-09 17:37:26,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1290 transitions. [2021-07-09 17:37:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:26,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:26,094 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7715,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,294 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2070552084, now seen corresponding path program 301 times [2021-07-09 17:37:26,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221973355] [2021-07-09 17:37:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221973355] [2021-07-09 17:37:26,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221973355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333825883] [2021-07-09 17:37:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:26,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:26,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:26,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:26,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:26,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:26,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:26,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:26,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:26,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:155 [2021-07-09 17:37:27,006 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-07-09 17:37:27,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:27,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:27,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:27,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:37:27,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:27,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:27,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:27,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:27,051 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 17:37:27,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:27,062 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:27,067 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:27,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,274 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-09 17:37:27,274 INFO L628 ElimStorePlain]: treesize reduction 110, result has 65.0 percent of original size [2021-07-09 17:37:27,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:37:27,280 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:27,284 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:27,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:27,289 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:27,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:27,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:37:27,375 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:459, output treesize:105 [2021-07-09 17:37:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:27,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333825883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:27,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:27,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483223325] [2021-07-09 17:37:27,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:27,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:27,486 INFO L87 Difference]: Start difference. First operand 399 states and 1290 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,921 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-07-09 17:37:28,175 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-07-09 17:37:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:28,354 INFO L93 Difference]: Finished difference Result 456 states and 1442 transitions. [2021-07-09 17:37:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:28,355 INFO L225 Difference]: With dead ends: 456 [2021-07-09 17:37:28,355 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:37:28,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:37:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 402. [2021-07-09 17:37:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.229426433915212) internal successors, (1295), 401 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1295 transitions. [2021-07-09 17:37:28,360 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1295 transitions. Word has length 18 [2021-07-09 17:37:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:28,360 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1295 transitions. [2021-07-09 17:37:28,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1295 transitions. [2021-07-09 17:37:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:28,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:28,361 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:28,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7727,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:28,561 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1144528640, now seen corresponding path program 302 times [2021-07-09 17:37:28,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:28,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436475657] [2021-07-09 17:37:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436475657] [2021-07-09 17:37:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436475657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166857318] [2021-07-09 17:37:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:28,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:28,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:28,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:28,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:28,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:28,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:28,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:28,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:28,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:28,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:28,992 INFO L628 ElimStorePlain]: treesize reduction 82, result has 61.1 percent of original size [2021-07-09 17:37:28,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:28,993 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:277, output treesize:129 [2021-07-09 17:37:29,263 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1945, array_4], 6=[v_prenex_1944, array_2]} [2021-07-09 17:37:29,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:29,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:29,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:29,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,351 INFO L628 ElimStorePlain]: treesize reduction 166, result has 35.4 percent of original size [2021-07-09 17:37:29,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:29,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:29,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1944 vanished before elimination [2021-07-09 17:37:29,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:37:29,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:29,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:29,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:29,439 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:278, output treesize:45 [2021-07-09 17:37:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166857318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:29,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:29,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387444425] [2021-07-09 17:37:29,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:29,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:29,499 INFO L87 Difference]: Start difference. First operand 402 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,006 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-07-09 17:37:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:30,249 INFO L93 Difference]: Finished difference Result 514 states and 1587 transitions. [2021-07-09 17:37:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:30,250 INFO L225 Difference]: With dead ends: 514 [2021-07-09 17:37:30,251 INFO L226 Difference]: Without dead ends: 500 [2021-07-09 17:37:30,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 827.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-09 17:37:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 404. [2021-07-09 17:37:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.2555831265508686) internal successors, (1312), 403 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1312 transitions. [2021-07-09 17:37:30,255 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1312 transitions. Word has length 18 [2021-07-09 17:37:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:30,256 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1312 transitions. [2021-07-09 17:37:30,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1312 transitions. [2021-07-09 17:37:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:30,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:30,256 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:30,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7755 [2021-07-09 17:37:30,457 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash 929513634, now seen corresponding path program 303 times [2021-07-09 17:37:30,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:30,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458323721] [2021-07-09 17:37:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458323721] [2021-07-09 17:37:30,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458323721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879813083] [2021-07-09 17:37:30,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:30,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:30,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:30,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:30,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,765 INFO L628 ElimStorePlain]: treesize reduction 35, result has 70.1 percent of original size [2021-07-09 17:37:30,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:30,766 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:163, output treesize:82 [2021-07-09 17:37:30,918 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-07-09 17:37:30,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:30,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:30,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:30,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:30,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:30,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:30,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:30,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:30,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,024 INFO L628 ElimStorePlain]: treesize reduction 191, result has 30.5 percent of original size [2021-07-09 17:37:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:31,028 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:31,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:31,031 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:31,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:31,061 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:274, output treesize:55 [2021-07-09 17:37:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879813083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389617213] [2021-07-09 17:37:31,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:31,146 INFO L87 Difference]: Start difference. First operand 404 states and 1312 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,569 INFO L93 Difference]: Finished difference Result 464 states and 1487 transitions. [2021-07-09 17:37:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,571 INFO L225 Difference]: With dead ends: 464 [2021-07-09 17:37:31,571 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 17:37:31,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 17:37:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 398. [2021-07-09 17:37:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.2367758186397984) internal successors, (1285), 397 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1285 transitions. [2021-07-09 17:37:31,575 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1285 transitions. Word has length 18 [2021-07-09 17:37:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,575 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1285 transitions. [2021-07-09 17:37:31,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1285 transitions. [2021-07-09 17:37:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:31,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,576 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:31,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7773 [2021-07-09 17:37:31,777 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1134489392, now seen corresponding path program 304 times [2021-07-09 17:37:31,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:31,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917392903] [2021-07-09 17:37:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917392903] [2021-07-09 17:37:31,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917392903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361204859] [2021-07-09 17:37:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:32,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:32,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:32,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:32,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:32,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:32,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:32,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:32,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:155 [2021-07-09 17:37:32,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:32,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:37:32,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:32,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:32,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:32,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:32,253 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:32,256 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:32,260 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:32,265 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:32,268 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,347 INFO L628 ElimStorePlain]: treesize reduction 110, result has 49.8 percent of original size [2021-07-09 17:37:32,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:32,351 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:32,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:32,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:32,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:32,387 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:421, output treesize:87 [2021-07-09 17:37:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361204859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:32,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:32,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706519230] [2021-07-09 17:37:32,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:32,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:32,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:32,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:32,554 INFO L87 Difference]: Start difference. First operand 398 states and 1285 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,001 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-07-09 17:37:33,315 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-09 17:37:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:33,418 INFO L93 Difference]: Finished difference Result 455 states and 1437 transitions. [2021-07-09 17:37:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:33,419 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:37:33,419 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 17:37:33,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 17:37:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 397. [2021-07-09 17:37:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.234848484848485) internal successors, (1281), 396 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1281 transitions. [2021-07-09 17:37:33,428 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1281 transitions. Word has length 18 [2021-07-09 17:37:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:33,428 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1281 transitions. [2021-07-09 17:37:33,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1281 transitions. [2021-07-09 17:37:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:33,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:33,429 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:33,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7784 [2021-07-09 17:37:33,630 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1272097146, now seen corresponding path program 305 times [2021-07-09 17:37:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:33,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999701164] [2021-07-09 17:37:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:33,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999701164] [2021-07-09 17:37:33,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999701164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879516535] [2021-07-09 17:37:33,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:33,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:33,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:33,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:33,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:33,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:33,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:33,972 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2021-07-09 17:37:33,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:33,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:155, output treesize:76 [2021-07-09 17:37:34,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:34,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:34,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:34,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:34,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:34,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:34,046 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:34,050 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:34,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:34,055 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:34,059 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,138 INFO L628 ElimStorePlain]: treesize reduction 207, result has 32.1 percent of original size [2021-07-09 17:37:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:34,143 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:34,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:34,146 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:34,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:34,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:34,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:34,183 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:361, output treesize:70 [2021-07-09 17:37:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879516535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:34,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:34,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840603237] [2021-07-09 17:37:34,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:34,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:34,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:34,319 INFO L87 Difference]: Start difference. First operand 397 states and 1281 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:34,756 INFO L93 Difference]: Finished difference Result 466 states and 1466 transitions. [2021-07-09 17:37:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:34,757 INFO L225 Difference]: With dead ends: 466 [2021-07-09 17:37:34,758 INFO L226 Difference]: Without dead ends: 461 [2021-07-09 17:37:34,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-09 17:37:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 397. [2021-07-09 17:37:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.234848484848485) internal successors, (1281), 396 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1281 transitions. [2021-07-09 17:37:34,762 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1281 transitions. Word has length 18 [2021-07-09 17:37:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:34,762 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1281 transitions. [2021-07-09 17:37:34,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1281 transitions. [2021-07-09 17:37:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:34,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:34,763 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:34,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7798,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:34,963 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:34,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1661314044, now seen corresponding path program 306 times [2021-07-09 17:37:34,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:34,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548174041] [2021-07-09 17:37:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:35,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548174041] [2021-07-09 17:37:35,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548174041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020865361] [2021-07-09 17:37:35,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:35,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:35,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:35,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:35,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:35,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:35,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:35,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:35,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,298 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2021-07-09 17:37:35,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:35,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:155, output treesize:76 [2021-07-09 17:37:35,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:35,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:35,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:35,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:35,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:35,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:35,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:35,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:35,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:35,382 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:35,386 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,471 INFO L628 ElimStorePlain]: treesize reduction 207, result has 32.1 percent of original size [2021-07-09 17:37:35,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:35,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:35,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:35,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:35,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:35,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:35,520 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:361, output treesize:70 [2021-07-09 17:37:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020865361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:35,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:35,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229662538] [2021-07-09 17:37:35,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:35,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:35,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:35,639 INFO L87 Difference]: Start difference. First operand 397 states and 1281 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:36,133 INFO L93 Difference]: Finished difference Result 449 states and 1423 transitions. [2021-07-09 17:37:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:36,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:36,134 INFO L225 Difference]: With dead ends: 449 [2021-07-09 17:37:36,134 INFO L226 Difference]: Without dead ends: 443 [2021-07-09 17:37:36,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-09 17:37:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 397. [2021-07-09 17:37:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.2323232323232323) internal successors, (1280), 396 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1280 transitions. [2021-07-09 17:37:36,139 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1280 transitions. Word has length 18 [2021-07-09 17:37:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:36,139 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1280 transitions. [2021-07-09 17:37:36,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1280 transitions. [2021-07-09 17:37:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:36,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:36,140 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7810,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,340 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1800492912, now seen corresponding path program 307 times [2021-07-09 17:37:36,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430840070] [2021-07-09 17:37:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:36,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430840070] [2021-07-09 17:37:36,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430840070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034821811] [2021-07-09 17:37:36,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:36,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:36,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:36,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:36,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:36,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:36,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:36,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:36,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:36,710 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:36,863 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 17:37:36,863 INFO L628 ElimStorePlain]: treesize reduction 67, result has 77.4 percent of original size [2021-07-09 17:37:36,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:37:36,871 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:262, output treesize:229 [2021-07-09 17:37:37,045 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-07-09 17:37:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:37:37,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:37,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:37,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:37,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:37,077 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:37,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-09 17:37:37,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:37,093 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:37,099 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:37,103 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:37,108 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:37,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:37,119 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:37,122 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,271 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-07-09 17:37:37,271 INFO L628 ElimStorePlain]: treesize reduction 230, result has 41.0 percent of original size [2021-07-09 17:37:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:37,276 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:37,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:37,280 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:37,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:37,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:37:37,331 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:689, output treesize:102 [2021-07-09 17:37:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034821811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:37,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9955375] [2021-07-09 17:37:37,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:37,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:37,479 INFO L87 Difference]: Start difference. First operand 397 states and 1280 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,997 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-07-09 17:37:38,325 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-09 17:37:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,395 INFO L93 Difference]: Finished difference Result 452 states and 1431 transitions. [2021-07-09 17:37:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,396 INFO L225 Difference]: With dead ends: 452 [2021-07-09 17:37:38,396 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 17:37:38,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 956.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 17:37:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 396. [2021-07-09 17:37:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.2253164556962024) internal successors, (1274), 395 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1274 transitions. [2021-07-09 17:37:38,400 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1274 transitions. Word has length 18 [2021-07-09 17:37:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,400 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1274 transitions. [2021-07-09 17:37:38,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1274 transitions. [2021-07-09 17:37:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:38,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,401 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7824,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,601 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1262637334, now seen corresponding path program 308 times [2021-07-09 17:37:38,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110415073] [2021-07-09 17:37:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110415073] [2021-07-09 17:37:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110415073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560053852] [2021-07-09 17:37:38,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:38,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:38,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:38,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:38,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:38,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:38,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:38,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:38,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:38,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-07-09 17:37:38,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:38,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:38,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:39,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:39,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:37:39,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:39,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:39,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:39,018 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:39,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:39,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:39,028 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,092 INFO L628 ElimStorePlain]: treesize reduction 64, result has 58.2 percent of original size [2021-07-09 17:37:39,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:39,096 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:39,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:39,099 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:39,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:39,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:39,127 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-07-09 17:37:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560053852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:39,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869933438] [2021-07-09 17:37:39,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:39,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:39,236 INFO L87 Difference]: Start difference. First operand 396 states and 1274 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,625 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-09 17:37:39,811 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-09 17:37:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,139 INFO L93 Difference]: Finished difference Result 462 states and 1457 transitions. [2021-07-09 17:37:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,140 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:37:40,140 INFO L226 Difference]: Without dead ends: 456 [2021-07-09 17:37:40,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 866.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-09 17:37:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 393. [2021-07-09 17:37:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.2270408163265305) internal successors, (1265), 392 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1265 transitions. [2021-07-09 17:37:40,145 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1265 transitions. Word has length 18 [2021-07-09 17:37:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,145 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1265 transitions. [2021-07-09 17:37:40,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1265 transitions. [2021-07-09 17:37:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:40,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,145 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7856,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,346 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1966146404, now seen corresponding path program 309 times [2021-07-09 17:37:40,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079644737] [2021-07-09 17:37:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079644737] [2021-07-09 17:37:40,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079644737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948468304] [2021-07-09 17:37:40,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:40,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:40,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:40,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:40,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:40,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,629 INFO L628 ElimStorePlain]: treesize reduction 36, result has 68.7 percent of original size [2021-07-09 17:37:40,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:37:40,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:71 [2021-07-09 17:37:40,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:40,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:40,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:40,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:40,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:40,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:40,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:40,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:40,998 INFO L628 ElimStorePlain]: treesize reduction 206, result has 31.3 percent of original size [2021-07-09 17:37:41,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:41,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:41,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:41,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:41,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:41,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:41,041 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:304, output treesize:38 [2021-07-09 17:37:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948468304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:37:41,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277768619] [2021-07-09 17:37:41,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:41,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:41,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:41,098 INFO L87 Difference]: Start difference. First operand 393 states and 1265 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:42,063 INFO L93 Difference]: Finished difference Result 562 states and 1712 transitions. [2021-07-09 17:37:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:42,065 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:37:42,065 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:37:42,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:37:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 400. [2021-07-09 17:37:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.2406015037593985) internal successors, (1293), 399 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1293 transitions. [2021-07-09 17:37:42,070 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1293 transitions. Word has length 18 [2021-07-09 17:37:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:42,070 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1293 transitions. [2021-07-09 17:37:42,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1293 transitions. [2021-07-09 17:37:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:42,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:42,071 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:42,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7868 [2021-07-09 17:37:42,271 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1921892526, now seen corresponding path program 310 times [2021-07-09 17:37:42,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:42,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389306373] [2021-07-09 17:37:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:42,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389306373] [2021-07-09 17:37:42,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389306373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571179571] [2021-07-09 17:37:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:42,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:42,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:37:42,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:42,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:42,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:42,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:42,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:42,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,596 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-09 17:37:42,597 INFO L628 ElimStorePlain]: treesize reduction 56, result has 78.4 percent of original size [2021-07-09 17:37:42,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:42,598 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-07-09 17:37:43,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:43,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:43,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:43,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:43,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:43,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:43,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:43,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:43,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:43,162 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:43,168 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:43,174 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:43,180 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:43,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:43,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:43,197 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,349 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-07-09 17:37:43,349 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-07-09 17:37:43,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:43,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:43,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:43,358 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:43,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:37:43,415 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-07-09 17:37:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571179571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:43,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904471679] [2021-07-09 17:37:43,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:43,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:43,491 INFO L87 Difference]: Start difference. First operand 400 states and 1293 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,701 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-09 17:37:43,930 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2021-07-09 17:37:44,237 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2021-07-09 17:37:44,523 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2021-07-09 17:37:44,789 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 111 [2021-07-09 17:37:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,827 INFO L93 Difference]: Finished difference Result 487 states and 1518 transitions. [2021-07-09 17:37:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,828 INFO L225 Difference]: With dead ends: 487 [2021-07-09 17:37:44,828 INFO L226 Difference]: Without dead ends: 470 [2021-07-09 17:37:44,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1561.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-07-09 17:37:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 404. [2021-07-09 17:37:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.2208436724565757) internal successors, (1298), 403 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1298 transitions. [2021-07-09 17:37:44,833 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1298 transitions. Word has length 18 [2021-07-09 17:37:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,833 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1298 transitions. [2021-07-09 17:37:44,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1298 transitions. [2021-07-09 17:37:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:44,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,834 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:45,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7889,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,034 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 17080050, now seen corresponding path program 311 times [2021-07-09 17:37:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:45,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857984886] [2021-07-09 17:37:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857984886] [2021-07-09 17:37:45,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857984886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069265141] [2021-07-09 17:37:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:45,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:45,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:45,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:45,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:45,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,331 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:37:45,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:45,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-07-09 17:37:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:45,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:45,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,573 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-07-09 17:37:45,573 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:37:45,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:45,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:45,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:45,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:45,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:45,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:45,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:45,617 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:37:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069265141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:45,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635442422] [2021-07-09 17:37:45,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:45,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:45,638 INFO L87 Difference]: Start difference. First operand 404 states and 1298 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,956 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:37:46,231 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 17:37:46,372 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-07-09 17:37:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:46,653 INFO L93 Difference]: Finished difference Result 509 states and 1583 transitions. [2021-07-09 17:37:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:46,655 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:37:46,655 INFO L226 Difference]: Without dead ends: 497 [2021-07-09 17:37:46,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 971.0ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-07-09 17:37:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 407. [2021-07-09 17:37:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2216748768472905) internal successors, (1308), 406 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1308 transitions. [2021-07-09 17:37:46,660 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1308 transitions. Word has length 18 [2021-07-09 17:37:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:46,660 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1308 transitions. [2021-07-09 17:37:46,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1308 transitions. [2021-07-09 17:37:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:46,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:46,661 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:46,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7917 [2021-07-09 17:37:46,861 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1498317920, now seen corresponding path program 312 times [2021-07-09 17:37:46,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:46,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822604110] [2021-07-09 17:37:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:47,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822604110] [2021-07-09 17:37:47,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822604110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805353780] [2021-07-09 17:37:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:47,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:47,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:47,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:47,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:47,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:47,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,212 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:37:47,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:47,213 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-07-09 17:37:47,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:47,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:47,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:47,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:47,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:47,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:47,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:47,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:47,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,448 INFO L628 ElimStorePlain]: treesize reduction 81, result has 49.1 percent of original size [2021-07-09 17:37:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:47,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:47,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:47,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:47,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:47,482 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:200, output treesize:56 [2021-07-09 17:37:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805353780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:47,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:47,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511760493] [2021-07-09 17:37:47,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:47,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:47,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:47,549 INFO L87 Difference]: Start difference. First operand 407 states and 1308 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,994 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-09 17:37:48,331 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 17:37:48,482 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-07-09 17:37:48,640 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 17:37:48,846 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-09 17:37:49,008 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 17:37:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,175 INFO L93 Difference]: Finished difference Result 533 states and 1641 transitions. [2021-07-09 17:37:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:37:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,176 INFO L225 Difference]: With dead ends: 533 [2021-07-09 17:37:49,177 INFO L226 Difference]: Without dead ends: 519 [2021-07-09 17:37:49,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1577.8ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-09 17:37:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 405. [2021-07-09 17:37:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.245049504950495) internal successors, (1311), 404 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-07-09 17:37:49,182 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-07-09 17:37:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,182 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-07-09 17:37:49,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-07-09 17:37:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:49,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,182 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7930,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,383 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 218254206, now seen corresponding path program 313 times [2021-07-09 17:37:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314389365] [2021-07-09 17:37:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314389365] [2021-07-09 17:37:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314389365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135479601] [2021-07-09 17:37:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:49,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:49,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:49,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:49,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:49,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:49,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:49,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:49,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,724 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:37:49,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:49,725 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:49,963 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1981], 1=[array_0, v_prenex_1980]} [2021-07-09 17:37:49,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:49,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:49,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:49,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,000 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-07-09 17:37:50,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:50,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:50,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:50,019 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:37:50,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:50,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:50,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:50,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:50,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:50,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:50,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:50,045 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:37:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135479601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:50,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294982435] [2021-07-09 17:37:50,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:50,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:50,065 INFO L87 Difference]: Start difference. First operand 405 states and 1311 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:50,782 INFO L93 Difference]: Finished difference Result 543 states and 1663 transitions. [2021-07-09 17:37:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:50,783 INFO L225 Difference]: With dead ends: 543 [2021-07-09 17:37:50,783 INFO L226 Difference]: Without dead ends: 538 [2021-07-09 17:37:50,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 800.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-09 17:37:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-07-09 17:37:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.254278728606357) internal successors, (1331), 409 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1331 transitions. [2021-07-09 17:37:50,789 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1331 transitions. Word has length 18 [2021-07-09 17:37:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:50,789 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1331 transitions. [2021-07-09 17:37:50,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1331 transitions. [2021-07-09 17:37:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:50,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:50,789 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:50,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7941,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:50,990 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:50,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1074750152, now seen corresponding path program 314 times [2021-07-09 17:37:50,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:50,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932738820] [2021-07-09 17:37:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:51,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932738820] [2021-07-09 17:37:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932738820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572429585] [2021-07-09 17:37:51,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:51,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:51,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:51,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:51,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:51,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:51,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,319 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:37:51,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:51,320 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:51,566 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1986], 1=[array_0, v_prenex_1985]} [2021-07-09 17:37:51,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:51,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:51,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:51,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,614 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:37:51,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:51,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:51,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:51,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:51,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:51,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:51,657 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1985 vanished before elimination [2021-07-09 17:37:51,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:51,658 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:37:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572429585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:51,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710523956] [2021-07-09 17:37:51,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:51,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:51,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:51,680 INFO L87 Difference]: Start difference. First operand 410 states and 1331 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,211 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-09 17:37:52,414 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-07-09 17:37:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:52,551 INFO L93 Difference]: Finished difference Result 539 states and 1664 transitions. [2021-07-09 17:37:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:52,553 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:37:52,553 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:37:52,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 897.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:37:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 413. [2021-07-09 17:37:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.2597087378640777) internal successors, (1343), 412 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1343 transitions. [2021-07-09 17:37:52,558 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1343 transitions. Word has length 18 [2021-07-09 17:37:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:52,558 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1343 transitions. [2021-07-09 17:37:52,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1343 transitions. [2021-07-09 17:37:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:52,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:52,559 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:52,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7958 [2021-07-09 17:37:52,759 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:52,759 INFO L82 PathProgramCache]: Analyzing trace with hash -865238594, now seen corresponding path program 315 times [2021-07-09 17:37:52,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:52,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981943940] [2021-07-09 17:37:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:52,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:52,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981943940] [2021-07-09 17:37:52,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981943940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711650417] [2021-07-09 17:37:52,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:52,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:53,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:53,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:53,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:53,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:53,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:53,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,088 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:37:53,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:53,089 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:37:53,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:37:53,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:53,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,374 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-07-09 17:37:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:53,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:53,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:53,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:53,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:53,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:53,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:53,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:53,431 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1991 vanished before elimination [2021-07-09 17:37:53,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:53,432 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-07-09 17:37:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711650417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:53,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024016544] [2021-07-09 17:37:53,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:53,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:53,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:53,490 INFO L87 Difference]: Start difference. First operand 413 states and 1343 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,134 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 17:37:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,300 INFO L93 Difference]: Finished difference Result 556 states and 1707 transitions. [2021-07-09 17:37:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,301 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:37:54,301 INFO L226 Difference]: Without dead ends: 551 [2021-07-09 17:37:54,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 853.6ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-09 17:37:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 405. [2021-07-09 17:37:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.245049504950495) internal successors, (1311), 404 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-07-09 17:37:54,306 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-07-09 17:37:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,306 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-07-09 17:37:54,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-07-09 17:37:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:54,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,307 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:54,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7976,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:54,507 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1291353208, now seen corresponding path program 316 times [2021-07-09 17:37:54,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:54,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700805379] [2021-07-09 17:37:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:54,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:54,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700805379] [2021-07-09 17:37:54,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700805379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:54,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004499902] [2021-07-09 17:37:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:54,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:54,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:54,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:54,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:54,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:54,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:54,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:54,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:54,869 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:37:54,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:54,870 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:55,141 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1997], 1=[array_0, v_prenex_1996]} [2021-07-09 17:37:55,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:55,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:55,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:55,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,189 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:37:55,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:55,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:55,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:55,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:55,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:55,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:55,212 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:55,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:55,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:55,232 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1996 vanished before elimination [2021-07-09 17:37:55,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:55,233 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:37:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004499902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:37:55,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598095078] [2021-07-09 17:37:55,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:55,253 INFO L87 Difference]: Start difference. First operand 405 states and 1311 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,640 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-09 17:37:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:55,830 INFO L93 Difference]: Finished difference Result 530 states and 1609 transitions. [2021-07-09 17:37:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:55,831 INFO L225 Difference]: With dead ends: 530 [2021-07-09 17:37:55,832 INFO L226 Difference]: Without dead ends: 525 [2021-07-09 17:37:55,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-09 17:37:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 407. [2021-07-09 17:37:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2389162561576357) internal successors, (1315), 406 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1315 transitions. [2021-07-09 17:37:55,837 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1315 transitions. Word has length 18 [2021-07-09 17:37:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:55,837 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1315 transitions. [2021-07-09 17:37:55,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1315 transitions. [2021-07-09 17:37:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:55,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:55,838 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:56,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7994,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,038 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2020148926, now seen corresponding path program 317 times [2021-07-09 17:37:56,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:56,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867777639] [2021-07-09 17:37:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867777639] [2021-07-09 17:37:56,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867777639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246906837] [2021-07-09 17:37:56,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:56,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:56,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:56,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:56,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:56,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:56,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:56,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:56,307 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:119 [2021-07-09 17:37:56,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:56,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:56,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:56,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:56,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:56,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:56,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:56,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:37:56,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:37:56,752 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:56,757 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:37:56,762 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:37:56,767 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,921 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-07-09 17:37:56,922 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.3 percent of original size [2021-07-09 17:37:56,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:37:56,926 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:37:56,931 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:56,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:37:56,934 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:56,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:56,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:37:56,995 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:395, output treesize:76 [2021-07-09 17:37:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246906837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:57,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:37:57,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587528875] [2021-07-09 17:37:57,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:57,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:57,077 INFO L87 Difference]: Start difference. First operand 407 states and 1315 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,709 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-07-09 17:37:57,974 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 102 [2021-07-09 17:37:58,269 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 102 [2021-07-09 17:37:58,544 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2021-07-09 17:37:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:58,595 INFO L93 Difference]: Finished difference Result 521 states and 1598 transitions. [2021-07-09 17:37:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:37:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:58,596 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:37:58,596 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:37:58,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1586.9ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:37:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:37:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 407. [2021-07-09 17:37:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2389162561576357) internal successors, (1315), 406 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1315 transitions. [2021-07-09 17:37:58,601 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1315 transitions. Word has length 18 [2021-07-09 17:37:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:58,601 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1315 transitions. [2021-07-09 17:37:58,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1315 transitions. [2021-07-09 17:37:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:37:58,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:58,602 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8011 [2021-07-09 17:37:58,802 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1179352520, now seen corresponding path program 318 times [2021-07-09 17:37:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394337544] [2021-07-09 17:37:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:58,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394337544] [2021-07-09 17:37:58,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394337544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514281779] [2021-07-09 17:37:58,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:59,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:59,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:59,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:37:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:59,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:37:59,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:37:59,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:59,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:37:59,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:37:59,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,148 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:37:59,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:37:59,149 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:37:59,367 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_2006], 1=[array_0, v_prenex_2005]} [2021-07-09 17:37:59,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:37:59,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:37:59,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:37:59,413 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:37:59,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:37:59,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:59,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:37:59,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:37:59,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:37:59,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:59,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:59,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:59,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2005 vanished before elimination [2021-07-09 17:37:59,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:59,455 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:37:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514281779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:37:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894018606] [2021-07-09 17:37:59,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:37:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:37:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:59,476 INFO L87 Difference]: Start difference. First operand 407 states and 1315 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,834 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-09 17:38:00,068 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-07-09 17:38:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,203 INFO L93 Difference]: Finished difference Result 515 states and 1583 transitions. [2021-07-09 17:38:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,205 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:38:00,205 INFO L226 Difference]: Without dead ends: 510 [2021-07-09 17:38:00,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-09 17:38:00,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 408. [2021-07-09 17:38:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.235872235872236) internal successors, (1317), 407 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1317 transitions. [2021-07-09 17:38:00,210 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1317 transitions. Word has length 18 [2021-07-09 17:38:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,210 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1317 transitions. [2021-07-09 17:38:00,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1317 transitions. [2021-07-09 17:38:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:00,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,210 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8039 [2021-07-09 17:38:00,411 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1105980040, now seen corresponding path program 319 times [2021-07-09 17:38:00,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794302528] [2021-07-09 17:38:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:00,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794302528] [2021-07-09 17:38:00,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794302528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044209602] [2021-07-09 17:38:00,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:00,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:00,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:00,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:00,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:00,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:00,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:00,686 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,747 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:38:00,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:00,748 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:38:00,906 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_2008], 1=[array_0, v_prenex_2007]} [2021-07-09 17:38:00,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:00,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:00,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:00,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:00,966 INFO L628 ElimStorePlain]: treesize reduction 69, result has 48.1 percent of original size [2021-07-09 17:38:00,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:00,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:00,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:00,994 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:38:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:00,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:00,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:01,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:01,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:01,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:01,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:01,031 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:154, output treesize:53 [2021-07-09 17:38:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:01,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044209602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:01,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:01,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418814766] [2021-07-09 17:38:01,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:01,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:01,104 INFO L87 Difference]: Start difference. First operand 408 states and 1317 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,560 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-09 17:38:01,766 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-07-09 17:38:01,997 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-07-09 17:38:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,077 INFO L93 Difference]: Finished difference Result 509 states and 1571 transitions. [2021-07-09 17:38:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:02,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,078 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:38:02,078 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:38:02,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1025.0ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:38:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 405. [2021-07-09 17:38:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.245049504950495) internal successors, (1311), 404 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-07-09 17:38:02,085 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-07-09 17:38:02,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,085 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-07-09 17:38:02,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-07-09 17:38:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:02,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,086 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:02,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8057 [2021-07-09 17:38:02,287 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1677641664, now seen corresponding path program 320 times [2021-07-09 17:38:02,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:02,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102201609] [2021-07-09 17:38:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:02,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102201609] [2021-07-09 17:38:02,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102201609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879257151] [2021-07-09 17:38:02,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:02,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:02,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:02,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:02,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:02,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:02,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:02,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:02,584 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:119 [2021-07-09 17:38:02,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-07-09 17:38:03,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:03,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:03,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:03,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:03,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:03,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:03,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:03,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:03,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:03,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:03,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:03,100 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:03,105 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,270 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-07-09 17:38:03,270 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.3 percent of original size [2021-07-09 17:38:03,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:38:03,276 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:38:03,287 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:03,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:38:03,291 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:03,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:03,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 17:38:03,360 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:395, output treesize:76 [2021-07-09 17:38:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879257151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:03,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:03,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471829979] [2021-07-09 17:38:03,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:03,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:03,447 INFO L87 Difference]: Start difference. First operand 405 states and 1311 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,920 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 17:38:04,072 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-09 17:38:04,358 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2021-07-09 17:38:04,688 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-07-09 17:38:04,815 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-07-09 17:38:04,997 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-09 17:38:05,188 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 17:38:05,362 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-09 17:38:05,557 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-09 17:38:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:05,652 INFO L93 Difference]: Finished difference Result 518 states and 1593 transitions. [2021-07-09 17:38:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:05,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:05,654 INFO L225 Difference]: With dead ends: 518 [2021-07-09 17:38:05,654 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:38:05,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2250.2ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:38:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-07-09 17:38:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.241975308641975) internal successors, (1313), 405 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1313 transitions. [2021-07-09 17:38:05,659 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1313 transitions. Word has length 18 [2021-07-09 17:38:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:05,659 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1313 transitions. [2021-07-09 17:38:05,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1313 transitions. [2021-07-09 17:38:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:05,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:05,659 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8073,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,860 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,860 INFO L82 PathProgramCache]: Analyzing trace with hash 320348340, now seen corresponding path program 321 times [2021-07-09 17:38:05,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921612287] [2021-07-09 17:38:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921612287] [2021-07-09 17:38:06,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921612287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053825801] [2021-07-09 17:38:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:06,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:06,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:06,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:06,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:06,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:06,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:06,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:06,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:06,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,266 INFO L628 ElimStorePlain]: treesize reduction 68, result has 59.8 percent of original size [2021-07-09 17:38:06,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:06,267 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:235, output treesize:101 [2021-07-09 17:38:06,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:06,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:06,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,780 INFO L628 ElimStorePlain]: treesize reduction 78, result has 44.3 percent of original size [2021-07-09 17:38:06,780 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:38:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:06,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:06,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:06,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:06,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:06,843 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:154, output treesize:18 [2021-07-09 17:38:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053825801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:06,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378802981] [2021-07-09 17:38:06,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:06,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:06,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:06,869 INFO L87 Difference]: Start difference. First operand 406 states and 1313 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,141 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-07-09 17:38:07,347 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-09 17:38:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,811 INFO L93 Difference]: Finished difference Result 527 states and 1627 transitions. [2021-07-09 17:38:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:07,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,812 INFO L225 Difference]: With dead ends: 527 [2021-07-09 17:38:07,812 INFO L226 Difference]: Without dead ends: 517 [2021-07-09 17:38:07,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-09 17:38:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 407. [2021-07-09 17:38:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2389162561576357) internal successors, (1315), 406 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1315 transitions. [2021-07-09 17:38:07,818 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1315 transitions. Word has length 18 [2021-07-09 17:38:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,818 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1315 transitions. [2021-07-09 17:38:07,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1315 transitions. [2021-07-09 17:38:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:07,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,818 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:08,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8101 [2021-07-09 17:38:08,019 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash -494457814, now seen corresponding path program 322 times [2021-07-09 17:38:08,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:08,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599353526] [2021-07-09 17:38:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599353526] [2021-07-09 17:38:08,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599353526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450284739] [2021-07-09 17:38:08,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:08,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:08,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:08,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:08,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:08,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:08,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:08,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:08,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,440 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-07-09 17:38:08,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:08,441 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:38:08,625 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2030, array_4], 1=[array_0, v_prenex_2029]} [2021-07-09 17:38:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:08,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:38:08,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:38:08,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:08,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,712 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.3 percent of original size [2021-07-09 17:38:08,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:08,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:08,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,746 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:38:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:08,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:08,753 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:08,785 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:187, output treesize:53 [2021-07-09 17:38:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450284739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:08,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484390824] [2021-07-09 17:38:08,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:08,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:08,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:08,859 INFO L87 Difference]: Start difference. First operand 407 states and 1315 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,319 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-09 17:38:09,520 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-07-09 17:38:09,720 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-09 17:38:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,793 INFO L93 Difference]: Finished difference Result 488 states and 1526 transitions. [2021-07-09 17:38:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,794 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:38:09,794 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:38:09,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:38:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 406. [2021-07-09 17:38:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.241975308641975) internal successors, (1313), 405 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1313 transitions. [2021-07-09 17:38:09,799 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1313 transitions. Word has length 18 [2021-07-09 17:38:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,799 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1313 transitions. [2021-07-09 17:38:09,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1313 transitions. [2021-07-09 17:38:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:09,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,800 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:10,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8121 [2021-07-09 17:38:10,000 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:10,000 INFO L82 PathProgramCache]: Analyzing trace with hash -858732690, now seen corresponding path program 323 times [2021-07-09 17:38:10,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:10,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631926032] [2021-07-09 17:38:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631926032] [2021-07-09 17:38:10,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631926032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971615311] [2021-07-09 17:38:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:10,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:10,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:10,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:38:10,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-07-09 17:38:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:38:10,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:10,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:10,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:10,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,527 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-09 17:38:10,528 INFO L628 ElimStorePlain]: treesize reduction 72, result has 76.5 percent of original size [2021-07-09 17:38:10,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:10,537 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:277, output treesize:235 [2021-07-09 17:38:10,807 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-07-09 17:38:10,897 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 28=[array_4]} [2021-07-09 17:38:10,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-07-09 17:38:10,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:10,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:10,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:10,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:10,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:10,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:10,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:10,957 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:10,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-07-09 17:38:10,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:10,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:10,990 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:10,998 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:11,006 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:11,014 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,314 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 76 [2021-07-09 17:38:11,315 INFO L628 ElimStorePlain]: treesize reduction 282, result has 46.1 percent of original size [2021-07-09 17:38:11,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:38:11,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:38:11,328 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,436 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 17:38:11,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:11,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 17:38:11,440 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:721, output treesize:163 [2021-07-09 17:38:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971615311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:11,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518250080] [2021-07-09 17:38:11,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:11,646 INFO L87 Difference]: Start difference. First operand 406 states and 1313 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,788 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 99 [2021-07-09 17:38:13,057 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-07-09 17:38:13,293 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2021-07-09 17:38:13,527 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 115 [2021-07-09 17:38:13,793 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 120 [2021-07-09 17:38:13,934 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-07-09 17:38:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:14,182 INFO L93 Difference]: Finished difference Result 578 states and 1784 transitions. [2021-07-09 17:38:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:14,183 INFO L225 Difference]: With dead ends: 578 [2021-07-09 17:38:14,183 INFO L226 Difference]: Without dead ends: 558 [2021-07-09 17:38:14,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2458.1ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-09 17:38:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 407. [2021-07-09 17:38:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2364532019704435) internal successors, (1314), 406 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1314 transitions. [2021-07-09 17:38:14,188 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1314 transitions. Word has length 18 [2021-07-09 17:38:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:14,188 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1314 transitions. [2021-07-09 17:38:14,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1314 transitions. [2021-07-09 17:38:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:14,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:14,189 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8136 [2021-07-09 17:38:14,389 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash 570222416, now seen corresponding path program 324 times [2021-07-09 17:38:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058225791] [2021-07-09 17:38:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058225791] [2021-07-09 17:38:14,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058225791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44667964] [2021-07-09 17:38:14,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:14,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:14,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:14,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:14,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:14,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,735 INFO L628 ElimStorePlain]: treesize reduction 23, result has 68.5 percent of original size [2021-07-09 17:38:14,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:14,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:119, output treesize:50 [2021-07-09 17:38:14,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:14,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:14,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:14,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:14,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:14,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:38:14,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-07-09 17:38:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:14,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 17:38:14,841 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:14,844 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,915 INFO L628 ElimStorePlain]: treesize reduction 207, result has 26.6 percent of original size [2021-07-09 17:38:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:14,918 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:14,921 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:14,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:14,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:14,951 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:310, output treesize:53 [2021-07-09 17:38:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44667964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:15,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:15,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036313035] [2021-07-09 17:38:15,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:15,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:15,066 INFO L87 Difference]: Start difference. First operand 407 states and 1314 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,566 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-07-09 17:38:15,769 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-07-09 17:38:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:15,853 INFO L93 Difference]: Finished difference Result 490 states and 1529 transitions. [2021-07-09 17:38:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:15,854 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:38:15,854 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:38:15,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:38:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 405. [2021-07-09 17:38:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.235148514851485) internal successors, (1307), 404 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1307 transitions. [2021-07-09 17:38:15,859 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1307 transitions. Word has length 18 [2021-07-09 17:38:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:15,859 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1307 transitions. [2021-07-09 17:38:15,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1307 transitions. [2021-07-09 17:38:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:15,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:15,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:16,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8153,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:16,060 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1318158342, now seen corresponding path program 325 times [2021-07-09 17:38:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:16,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032856930] [2021-07-09 17:38:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032856930] [2021-07-09 17:38:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032856930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464574773] [2021-07-09 17:38:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:16,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:16,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:16,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:16,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:16,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:16,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:16,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,427 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:38:16,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:16,428 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:38:16,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:38:16,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:38:16,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:16,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:16,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:16,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:16,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:16,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:16,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,629 INFO L628 ElimStorePlain]: treesize reduction 174, result has 32.3 percent of original size [2021-07-09 17:38:16,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:16,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:16,635 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:16,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:16,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:16,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:16,665 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-07-09 17:38:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464574773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:16,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:16,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591365562] [2021-07-09 17:38:16,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:16,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:16,778 INFO L87 Difference]: Start difference. First operand 405 states and 1307 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,261 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 17:38:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:17,470 INFO L93 Difference]: Finished difference Result 508 states and 1572 transitions. [2021-07-09 17:38:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:17,471 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:38:17,471 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:38:17,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:38:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 406. [2021-07-09 17:38:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.234567901234568) internal successors, (1310), 405 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1310 transitions. [2021-07-09 17:38:17,476 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1310 transitions. Word has length 18 [2021-07-09 17:38:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:17,476 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1310 transitions. [2021-07-09 17:38:17,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1310 transitions. [2021-07-09 17:38:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:17,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:17,477 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:17,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8165 [2021-07-09 17:38:17,677 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:17,677 INFO L82 PathProgramCache]: Analyzing trace with hash 43397764, now seen corresponding path program 326 times [2021-07-09 17:38:17,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:17,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545870254] [2021-07-09 17:38:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:17,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545870254] [2021-07-09 17:38:17,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545870254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487110081] [2021-07-09 17:38:17,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:17,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:17,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:17,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:17,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:17,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:17,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:17,997 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:18,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,060 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-07-09 17:38:18,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:18,061 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-07-09 17:38:18,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 17:38:18,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 17:38:18,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:18,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:18,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:18,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:18,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:18,186 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:18,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,257 INFO L628 ElimStorePlain]: treesize reduction 174, result has 32.3 percent of original size [2021-07-09 17:38:18,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:18,261 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:18,263 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:18,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:18,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:18,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:18,296 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-07-09 17:38:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487110081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860651376] [2021-07-09 17:38:18,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:18,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:18,405 INFO L87 Difference]: Start difference. First operand 406 states and 1310 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,901 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 17:38:19,069 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-07-09 17:38:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:19,118 INFO L93 Difference]: Finished difference Result 488 states and 1522 transitions. [2021-07-09 17:38:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:19,119 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:38:19,119 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:38:19,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:38:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 405. [2021-07-09 17:38:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.235148514851485) internal successors, (1307), 404 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1307 transitions. [2021-07-09 17:38:19,124 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1307 transitions. Word has length 18 [2021-07-09 17:38:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:19,124 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1307 transitions. [2021-07-09 17:38:19,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1307 transitions. [2021-07-09 17:38:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:19,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:19,125 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:19,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8178,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,325 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash 722016768, now seen corresponding path program 327 times [2021-07-09 17:38:19,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:19,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673803782] [2021-07-09 17:38:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:19,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673803782] [2021-07-09 17:38:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673803782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961286718] [2021-07-09 17:38:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:38:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:19,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:19,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:19,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:19,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:19,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:19,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:19,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:19,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:119 [2021-07-09 17:38:19,762 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-07-09 17:38:19,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:19,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:19,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:19,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:19,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:19,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:19,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:19,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:19,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:19,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:19,794 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,865 INFO L628 ElimStorePlain]: treesize reduction 108, result has 44.9 percent of original size [2021-07-09 17:38:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:38:19,868 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:38:19,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:19,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:19,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:38:19,900 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:337, output treesize:72 [2021-07-09 17:38:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:20,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961286718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:20,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:38:20,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875864432] [2021-07-09 17:38:20,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:38:20,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:38:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:20,010 INFO L87 Difference]: Start difference. First operand 405 states and 1307 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,414 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-09 17:38:20,589 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-09 17:38:20,769 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 17:38:20,908 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 17:38:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:20,975 INFO L93 Difference]: Finished difference Result 495 states and 1545 transitions. [2021-07-09 17:38:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:20,977 INFO L225 Difference]: With dead ends: 495 [2021-07-09 17:38:20,977 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:38:20,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:38:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 403. [2021-07-09 17:38:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.228855721393035) internal successors, (1298), 402 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1298 transitions. [2021-07-09 17:38:20,981 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1298 transitions. Word has length 18 [2021-07-09 17:38:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:20,981 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1298 transitions. [2021-07-09 17:38:20,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1298 transitions. [2021-07-09 17:38:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:20,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:20,982 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8191,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,183 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,183 INFO L82 PathProgramCache]: Analyzing trace with hash 476419644, now seen corresponding path program 328 times [2021-07-09 17:38:21,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598407784] [2021-07-09 17:38:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598407784] [2021-07-09 17:38:21,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598407784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120803313] [2021-07-09 17:38:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:21,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:21,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:21,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:21,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:21,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:21,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-07-09 17:38:21,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:21,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:21,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:21,544 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:38:21,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:21,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:21,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:21,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:21,553 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:38:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120803313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:21,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:21,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002477751] [2021-07-09 17:38:21,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:21,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:21,572 INFO L87 Difference]: Start difference. First operand 403 states and 1298 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:21,998 INFO L93 Difference]: Finished difference Result 485 states and 1520 transitions. [2021-07-09 17:38:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:21,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,000 INFO L225 Difference]: With dead ends: 485 [2021-07-09 17:38:22,000 INFO L226 Difference]: Without dead ends: 479 [2021-07-09 17:38:22,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:22,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-09 17:38:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 411. [2021-07-09 17:38:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.234146341463415) internal successors, (1326), 410 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1326 transitions. [2021-07-09 17:38:22,005 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1326 transitions. Word has length 18 [2021-07-09 17:38:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,005 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1326 transitions. [2021-07-09 17:38:22,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1326 transitions. [2021-07-09 17:38:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:22,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,006 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:22,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8207,364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:22,206 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash -204932312, now seen corresponding path program 329 times [2021-07-09 17:38:22,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:22,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235700176] [2021-07-09 17:38:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:22,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235700176] [2021-07-09 17:38:22,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235700176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165365110] [2021-07-09 17:38:22,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:22,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:22,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:22,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:22,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:22,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:22,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:22,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:22,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:70, output treesize:56 [2021-07-09 17:38:22,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:22,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:22,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:22,629 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-07-09 17:38:22,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:22,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:22,647 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:38:22,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:22,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:22,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:22,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:22,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:22,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:22,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:22,672 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-07-09 17:38:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165365110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:22,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845826393] [2021-07-09 17:38:22,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:22,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:22,693 INFO L87 Difference]: Start difference. First operand 411 states and 1326 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:23,483 INFO L93 Difference]: Finished difference Result 514 states and 1599 transitions. [2021-07-09 17:38:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:23,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:23,484 INFO L225 Difference]: With dead ends: 514 [2021-07-09 17:38:23,484 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:38:23,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 740.0ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:38:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 407. [2021-07-09 17:38:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.226600985221675) internal successors, (1310), 406 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1310 transitions. [2021-07-09 17:38:23,489 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1310 transitions. Word has length 18 [2021-07-09 17:38:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:23,489 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1310 transitions. [2021-07-09 17:38:23,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1310 transitions. [2021-07-09 17:38:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:23,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:23,490 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:23,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8217,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,690 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1437517958, now seen corresponding path program 330 times [2021-07-09 17:38:23,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:23,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369969810] [2021-07-09 17:38:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369969810] [2021-07-09 17:38:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369969810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615524921] [2021-07-09 17:38:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:23,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:23,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:23,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:23,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:23,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:23,957 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:73, output treesize:59 [2021-07-09 17:38:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:24,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:24,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:24,096 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-07-09 17:38:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:24,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:24,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:24,105 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-07-09 17:38:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615524921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:24,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137484406] [2021-07-09 17:38:24,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:24,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:24,125 INFO L87 Difference]: Start difference. First operand 407 states and 1310 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:24,560 INFO L93 Difference]: Finished difference Result 454 states and 1439 transitions. [2021-07-09 17:38:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:24,561 INFO L225 Difference]: With dead ends: 454 [2021-07-09 17:38:24,561 INFO L226 Difference]: Without dead ends: 448 [2021-07-09 17:38:24,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-07-09 17:38:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 411. [2021-07-09 17:38:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.229268292682927) internal successors, (1324), 410 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1324 transitions. [2021-07-09 17:38:24,565 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1324 transitions. Word has length 18 [2021-07-09 17:38:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:24,565 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1324 transitions. [2021-07-09 17:38:24,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1324 transitions. [2021-07-09 17:38:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:24,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:24,566 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:24,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8226 [2021-07-09 17:38:24,767 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1190897786, now seen corresponding path program 331 times [2021-07-09 17:38:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:24,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120129393] [2021-07-09 17:38:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120129393] [2021-07-09 17:38:24,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120129393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128002849] [2021-07-09 17:38:24,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:24,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:24,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:24,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:24,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:25,000 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:76, output treesize:62 [2021-07-09 17:38:25,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:25,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:25,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:25,111 INFO L628 ElimStorePlain]: treesize reduction 71, result has 51.7 percent of original size [2021-07-09 17:38:25,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:25,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,142 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2043 vanished before elimination [2021-07-09 17:38:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:25,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:25,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:25,148 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:25,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:25,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:25,175 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:143, output treesize:47 [2021-07-09 17:38:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128002849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:25,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:25,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028361144] [2021-07-09 17:38:25,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:25,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:25,236 INFO L87 Difference]: Start difference. First operand 411 states and 1324 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:25,763 INFO L93 Difference]: Finished difference Result 463 states and 1467 transitions. [2021-07-09 17:38:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:38:25,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:25,764 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:38:25,764 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:38:25,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:38:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 409. [2021-07-09 17:38:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.2254901960784315) internal successors, (1316), 408 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1316 transitions. [2021-07-09 17:38:25,769 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1316 transitions. Word has length 18 [2021-07-09 17:38:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:25,769 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1316 transitions. [2021-07-09 17:38:25,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1316 transitions. [2021-07-09 17:38:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:25,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:25,769 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:25,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8235 [2021-07-09 17:38:25,970 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1364145478, now seen corresponding path program 332 times [2021-07-09 17:38:25,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:25,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211889966] [2021-07-09 17:38:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:26,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211889966] [2021-07-09 17:38:26,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211889966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024780840] [2021-07-09 17:38:26,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:26,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 17:38:26,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:26,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:26,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,271 INFO L628 ElimStorePlain]: treesize reduction 40, result has 67.7 percent of original size [2021-07-09 17:38:26,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:38:26,274 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:151, output treesize:84 [2021-07-09 17:38:26,378 INFO L446 ElimStorePlain]: Different costs {1=[array_0, v_prenex_2045], 3=[array_2, v_prenex_2046]} [2021-07-09 17:38:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:26,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:26,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,448 INFO L628 ElimStorePlain]: treesize reduction 106, result has 42.1 percent of original size [2021-07-09 17:38:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:26,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:26,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:26,480 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:38:26,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:26,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:26,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:26,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:26,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:26,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:26,521 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:197, output treesize:38 [2021-07-09 17:38:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024780840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:26,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:26,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899311290] [2021-07-09 17:38:26,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:26,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:26,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:26,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:26,576 INFO L87 Difference]: Start difference. First operand 409 states and 1316 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:27,045 INFO L93 Difference]: Finished difference Result 465 states and 1463 transitions. [2021-07-09 17:38:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:27,046 INFO L225 Difference]: With dead ends: 465 [2021-07-09 17:38:27,046 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 17:38:27,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 17:38:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 411. [2021-07-09 17:38:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.229268292682927) internal successors, (1324), 410 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1324 transitions. [2021-07-09 17:38:27,050 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1324 transitions. Word has length 18 [2021-07-09 17:38:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:27,051 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1324 transitions. [2021-07-09 17:38:27,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1324 transitions. [2021-07-09 17:38:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:27,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:27,051 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:27,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-07-09 17:38:27,252 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1974302726, now seen corresponding path program 333 times [2021-07-09 17:38:27,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:27,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502591899] [2021-07-09 17:38:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502591899] [2021-07-09 17:38:27,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502591899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764726979] [2021-07-09 17:38:27,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:27,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:27,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:27,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:27,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:27,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:27,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:27,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:27,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:27,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:27,497 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-07-09 17:38:27,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:27,498 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-07-09 17:38:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:27,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:27,576 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-07-09 17:38:27,576 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-07-09 17:38:27,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:27,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-07-09 17:38:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764726979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:27,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:27,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945008876] [2021-07-09 17:38:27,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:27,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:27,598 INFO L87 Difference]: Start difference. First operand 411 states and 1324 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:27,911 INFO L93 Difference]: Finished difference Result 448 states and 1420 transitions. [2021-07-09 17:38:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:27,912 INFO L225 Difference]: With dead ends: 448 [2021-07-09 17:38:27,912 INFO L226 Difference]: Without dead ends: 442 [2021-07-09 17:38:27,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-09 17:38:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 408. [2021-07-09 17:38:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.2383292383292384) internal successors, (1318), 407 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1318 transitions. [2021-07-09 17:38:27,917 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1318 transitions. Word has length 18 [2021-07-09 17:38:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:27,917 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1318 transitions. [2021-07-09 17:38:27,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1318 transitions. [2021-07-09 17:38:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:27,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:27,917 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:28,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8254,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,118 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:28,118 INFO L82 PathProgramCache]: Analyzing trace with hash 191781730, now seen corresponding path program 334 times [2021-07-09 17:38:28,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:28,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965229452] [2021-07-09 17:38:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965229452] [2021-07-09 17:38:28,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965229452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50336832] [2021-07-09 17:38:28,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:28,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:28,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:28,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:28,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:28,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:28,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:28,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:28,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:28,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:28,421 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:28,425 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:28,427 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,477 INFO L628 ElimStorePlain]: treesize reduction 97, result has 40.9 percent of original size [2021-07-09 17:38:28,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:28,478 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:283, output treesize:67 [2021-07-09 17:38:28,669 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2055, array_4], 1=[array_0, v_prenex_2054]} [2021-07-09 17:38:28,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:28,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:28,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:28,718 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:38:28,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:28,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:28,736 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:38:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:28,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:28,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:28,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:28,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:28,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:28,763 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:38:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50336832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:28,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705941151] [2021-07-09 17:38:28,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:28,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:28,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:28,783 INFO L87 Difference]: Start difference. First operand 408 states and 1318 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,236 INFO L93 Difference]: Finished difference Result 488 states and 1490 transitions. [2021-07-09 17:38:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,237 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:38:29,237 INFO L226 Difference]: Without dead ends: 483 [2021-07-09 17:38:29,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-07-09 17:38:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 408. [2021-07-09 17:38:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.2383292383292384) internal successors, (1318), 407 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1318 transitions. [2021-07-09 17:38:29,242 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1318 transitions. Word has length 18 [2021-07-09 17:38:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,243 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1318 transitions. [2021-07-09 17:38:29,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1318 transitions. [2021-07-09 17:38:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:29,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,243 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8261,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,444 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1705852318, now seen corresponding path program 335 times [2021-07-09 17:38:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972295798] [2021-07-09 17:38:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:29,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972295798] [2021-07-09 17:38:29,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972295798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873654542] [2021-07-09 17:38:29,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:29,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:29,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:29,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:29,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:29,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:29,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:29,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:29,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:29,727 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:29,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:29,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:29,736 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:29,738 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,786 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-07-09 17:38:29,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:29,787 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:283, output treesize:67 [2021-07-09 17:38:29,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:29,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:29,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,935 INFO L628 ElimStorePlain]: treesize reduction 95, result has 42.8 percent of original size [2021-07-09 17:38:29,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:29,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:29,957 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-07-09 17:38:29,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:29,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:29,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:29,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2057 vanished before elimination [2021-07-09 17:38:29,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:29,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:29,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:29,989 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:29,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:30,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:30,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:30,017 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:180, output treesize:53 [2021-07-09 17:38:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873654542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:30,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:30,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505393525] [2021-07-09 17:38:30,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:30,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:30,080 INFO L87 Difference]: Start difference. First operand 408 states and 1318 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:31,102 INFO L93 Difference]: Finished difference Result 650 states and 1981 transitions. [2021-07-09 17:38:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:31,104 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:38:31,104 INFO L226 Difference]: Without dead ends: 639 [2021-07-09 17:38:31,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 934.8ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-07-09 17:38:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 417. [2021-07-09 17:38:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.264423076923077) internal successors, (1358), 416 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1358 transitions. [2021-07-09 17:38:31,110 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1358 transitions. Word has length 18 [2021-07-09 17:38:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:31,110 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1358 transitions. [2021-07-09 17:38:31,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1358 transitions. [2021-07-09 17:38:31,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:31,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:31,111 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:31,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8279 [2021-07-09 17:38:31,311 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:31,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1651169188, now seen corresponding path program 336 times [2021-07-09 17:38:31,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:31,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312215477] [2021-07-09 17:38:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:31,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312215477] [2021-07-09 17:38:31,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312215477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201219124] [2021-07-09 17:38:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:31,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:31,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:31,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:31,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:31,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:31,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:31,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:31,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,704 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.1 percent of original size [2021-07-09 17:38:31,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 5 xjuncts. [2021-07-09 17:38:31,709 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:187, output treesize:137 [2021-07-09 17:38:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:31,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:31,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:31,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:31,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:31,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:32,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:32,005 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:32,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:32,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:32,020 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:32,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:32,029 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,152 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 17:38:32,152 INFO L628 ElimStorePlain]: treesize reduction 95, result has 60.1 percent of original size [2021-07-09 17:38:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:38:32,157 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-07-09 17:38:32,161 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:32,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:38:32,165 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:32,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:32,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:38:32,217 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:395, output treesize:68 [2021-07-09 17:38:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201219124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764055940] [2021-07-09 17:38:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:32,290 INFO L87 Difference]: Start difference. First operand 417 states and 1358 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:33,105 INFO L93 Difference]: Finished difference Result 486 states and 1526 transitions. [2021-07-09 17:38:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:33,106 INFO L225 Difference]: With dead ends: 486 [2021-07-09 17:38:33,106 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:38:33,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:38:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 421. [2021-07-09 17:38:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2642857142857142) internal successors, (1371), 420 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1371 transitions. [2021-07-09 17:38:33,110 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1371 transitions. Word has length 18 [2021-07-09 17:38:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:33,110 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1371 transitions. [2021-07-09 17:38:33,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1371 transitions. [2021-07-09 17:38:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:33,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:33,111 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:33,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8296,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,312 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash 555703338, now seen corresponding path program 337 times [2021-07-09 17:38:33,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:33,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901554675] [2021-07-09 17:38:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901554675] [2021-07-09 17:38:33,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901554675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375390030] [2021-07-09 17:38:33,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:33,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:33,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:33,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:33,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:33,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:33,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:33,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:33,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:33,677 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:33,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:33,683 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,741 INFO L628 ElimStorePlain]: treesize reduction 116, result has 41.1 percent of original size [2021-07-09 17:38:33,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:33,742 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:321, output treesize:81 [2021-07-09 17:38:33,866 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2066, array_4], 1=[array_0, v_prenex_2065]} [2021-07-09 17:38:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:33,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:33,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:33,913 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-07-09 17:38:33,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:33,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:33,930 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:38:33,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:33,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:33,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:33,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:33,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:33,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:33,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:38:33,956 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-07-09 17:38:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375390030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:33,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:33,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476384736] [2021-07-09 17:38:33,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:33,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:33,981 INFO L87 Difference]: Start difference. First operand 421 states and 1371 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:34,424 INFO L93 Difference]: Finished difference Result 457 states and 1460 transitions. [2021-07-09 17:38:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:34,425 INFO L225 Difference]: With dead ends: 457 [2021-07-09 17:38:34,425 INFO L226 Difference]: Without dead ends: 452 [2021-07-09 17:38:34,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-09 17:38:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 423. [2021-07-09 17:38:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.258293838862559) internal successors, (1375), 422 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1375 transitions. [2021-07-09 17:38:34,430 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1375 transitions. Word has length 18 [2021-07-09 17:38:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:34,430 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1375 transitions. [2021-07-09 17:38:34,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1375 transitions. [2021-07-09 17:38:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:34,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:34,431 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:34,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8337,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:34,631 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash 482330858, now seen corresponding path program 338 times [2021-07-09 17:38:34,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:34,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023715946] [2021-07-09 17:38:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023715946] [2021-07-09 17:38:34,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023715946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263363433] [2021-07-09 17:38:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:34,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:34,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:34,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:34,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:34,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 17:38:34,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:34,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:34,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:34,929 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:34,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:34,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:34,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:34,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:34,997 INFO L628 ElimStorePlain]: treesize reduction 116, result has 41.1 percent of original size [2021-07-09 17:38:34,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:34,998 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:321, output treesize:81 [2021-07-09 17:38:35,061 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_2068, v_prenex_2070], 1=[array_0, v_prenex_2067, v_prenex_2069]} [2021-07-09 17:38:35,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:35,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:35,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,118 INFO L628 ElimStorePlain]: treesize reduction 95, result has 42.8 percent of original size [2021-07-09 17:38:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:35,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:35,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:35,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,164 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:38:35,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2067 vanished before elimination [2021-07-09 17:38:35,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:35,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:35,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:35,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:35,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:35,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:35,197 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:180, output treesize:53 [2021-07-09 17:38:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263363433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:35,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:35,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932704282] [2021-07-09 17:38:35,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:35,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:35,259 INFO L87 Difference]: Start difference. First operand 423 states and 1375 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:35,821 INFO L93 Difference]: Finished difference Result 455 states and 1456 transitions. [2021-07-09 17:38:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:35,822 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:38:35,822 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 17:38:35,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 17:38:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 422. [2021-07-09 17:38:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.2612826603325415) internal successors, (1373), 421 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1373 transitions. [2021-07-09 17:38:35,828 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1373 transitions. Word has length 18 [2021-07-09 17:38:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:35,828 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1373 transitions. [2021-07-09 17:38:35,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1373 transitions. [2021-07-09 17:38:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:35,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:35,828 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:36,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8355 [2021-07-09 17:38:36,029 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -623377692, now seen corresponding path program 339 times [2021-07-09 17:38:36,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:36,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15728239] [2021-07-09 17:38:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15728239] [2021-07-09 17:38:36,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15728239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916069974] [2021-07-09 17:38:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:36,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:36,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:36,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:36,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:38:36,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 17:38:36,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:36,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:36,379 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,425 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-07-09 17:38:36,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:36,426 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-07-09 17:38:36,472 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2074, v_prenex_2072, array_2], 1=[v_prenex_2073, v_prenex_2071, array_0]} [2021-07-09 17:38:36,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:36,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:36,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,518 INFO L628 ElimStorePlain]: treesize reduction 83, result has 41.5 percent of original size [2021-07-09 17:38:36,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:36,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:36,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-07-09 17:38:36,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:36,559 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2073 vanished before elimination [2021-07-09 17:38:36,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:36,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-07-09 17:38:36,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-07-09 17:38:36,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:36,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:36,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:36,586 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-07-09 17:38:36,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:36,587 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:156, output treesize:45 [2021-07-09 17:38:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916069974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:36,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:38:36,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568638933] [2021-07-09 17:38:36,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:38:36,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:38:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:36,647 INFO L87 Difference]: Start difference. First operand 422 states and 1373 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,699 INFO L93 Difference]: Finished difference Result 485 states and 1533 transitions. [2021-07-09 17:38:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,701 INFO L225 Difference]: With dead ends: 485 [2021-07-09 17:38:37,701 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:38:37,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1040.9ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:38:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:38:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2021-07-09 17:38:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.2699530516431925) internal successors, (1393), 426 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1393 transitions. [2021-07-09 17:38:37,706 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1393 transitions. Word has length 18 [2021-07-09 17:38:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,706 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1393 transitions. [2021-07-09 17:38:37,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1393 transitions. [2021-07-09 17:38:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:37,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,706 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:37,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8370,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,907 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:37,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1558042014, now seen corresponding path program 340 times [2021-07-09 17:38:37,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:37,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219438491] [2021-07-09 17:38:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219438491] [2021-07-09 17:38:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219438491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182711642] [2021-07-09 17:38:38,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:38,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-07-09 17:38:38,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:38:38,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:38,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:38,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:38,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 17:38:38,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:38,210 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,279 INFO L628 ElimStorePlain]: treesize reduction 40, result has 76.3 percent of original size [2021-07-09 17:38:38,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:38:38,280 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:200, output treesize:129 [2021-07-09 17:38:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:38,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 17:38:38,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 17:38:38,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 17:38:38,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:38,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:38,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 17:38:38,374 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:38,377 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:38,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:38,383 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:38,386 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:38:38,389 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,441 INFO L628 ElimStorePlain]: treesize reduction 74, result has 51.6 percent of original size [2021-07-09 17:38:38,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-07-09 17:38:38,444 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:38,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 17:38:38,447 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:38,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:38,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:38:38,468 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 2 variables, input treesize:373, output treesize:57 [2021-07-09 17:38:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182711642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:38,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:38:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898987100] [2021-07-09 17:38:38,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:38,529 INFO L87 Difference]: Start difference. First operand 427 states and 1393 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,998 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2021-07-09 17:38:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:39,122 INFO L93 Difference]: Finished difference Result 461 states and 1478 transitions. [2021-07-09 17:38:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:39,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:38:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:39,123 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:38:39,123 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:38:39,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:38:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 428. [2021-07-09 17:38:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.2669789227166275) internal successors, (1395), 427 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1395 transitions. [2021-07-09 17:38:39,128 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1395 transitions. Word has length 18 [2021-07-09 17:38:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:39,128 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1395 transitions. [2021-07-09 17:38:39,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1395 transitions. [2021-07-09 17:38:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:38:39,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:39,128 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-07-09 17:38:39,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8382 [2021-07-09 17:38:39,329 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:39,329 INFO L82 PathProgramCache]: Analyzing trace with hash -696750172, now seen corresponding path program 341 times [2021-07-09 17:38:39,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:39,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847009578] [2021-07-09 17:38:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-07-09 17:38:39,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443219206] [2021-07-09 17:38:39,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:39,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:39,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:39,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:38:39,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:39,363 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-07-09 17:38:39,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8400 [2021-07-09 17:38:39,564 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:38:39,565 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:38:39,567 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:38:39,567 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:38:39 BasicIcfg [2021-07-09 17:38:39,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:38:39,567 INFO L168 Benchmark]: Toolchain (without parser) took 792910.41 ms. Allocated memory was 247.5 MB in the beginning and 419.4 MB in the end (delta: 172.0 MB). Free memory was 227.6 MB in the beginning and 372.6 MB in the end (delta: -145.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:38:39,567 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 247.5 MB. Free memory is still 228.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:38:39,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.45 ms. Allocated memory is still 247.5 MB. Free memory was 227.5 MB in the beginning and 226.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:38:39,567 INFO L168 Benchmark]: Boogie Preprocessor took 22.31 ms. Allocated memory is still 247.5 MB. Free memory was 226.0 MB in the beginning and 224.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:38:39,567 INFO L168 Benchmark]: RCFGBuilder took 340.33 ms. Allocated memory is still 247.5 MB. Free memory was 224.9 MB in the beginning and 203.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:38:39,567 INFO L168 Benchmark]: TraceAbstraction took 792516.56 ms. Allocated memory was 247.5 MB in the beginning and 419.4 MB in the end (delta: 172.0 MB). Free memory was 202.6 MB in the beginning and 372.6 MB in the end (delta: -170.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:38:39,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 247.5 MB. Free memory is still 228.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.45 ms. Allocated memory is still 247.5 MB. Free memory was 227.5 MB in the beginning and 226.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.31 ms. Allocated memory is still 247.5 MB. Free memory was 226.0 MB in the beginning and 224.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.33 ms. Allocated memory is still 247.5 MB. Free memory was 224.9 MB in the beginning and 203.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 792516.56 ms. Allocated memory was 247.5 MB in the beginning and 419.4 MB in the end (delta: 172.0 MB). Free memory was 202.6 MB in the beginning and 372.6 MB in the end (delta: -170.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 792421.5ms, OverallIterations: 382, TraceHistogramMax: 2, EmptinessCheckTime: 195.0ms, AutomataDifference: 354873.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12187 SDtfs, 28357 SDslu, 81507 SDs, 0 SdLazy, 191138 SolverSat, 2185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96570.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13098 GetRequests, 4484 SyntacticMatches, 692 SemanticMatches, 7922 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26163 ImplicationChecksByTransitivity, 380193.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=437occurred in iteration=317, InterpolantAutomatonStates: 4446, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1679.6ms AutomataMinimizationTime, 381 MinimizatonAttempts, 39917 StatesRemovedByMinimization, 380 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1459.7ms SsaConstructionTime, 3791.1ms SatisfiabilityAnalysisTime, 346359.7ms InterpolantComputationTime, 13106 NumberOfCodeBlocks, 13106 NumberOfCodeBlocksAsserted, 1102 NumberOfCheckSat, 12350 ConstructedInterpolants, 892 QuantifiedInterpolants, 368084 SizeOfPredicates, 3735 NumberOfNonLiveVariables, 28088 ConjunctsInSsa, 8099 ConjunctsInUnsatCore, 756 InterpolantComputations, 6 PerfectInterpolantSequences, 24/2930 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown